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24959112 | 10.1007/JHEP10(2013)222 | We detail a simulation of Higgs boson production via gluon fusion, accurate
at next-to-next-to-leading order in the strong coupling, including matching to
a parton shower, yielding a fully exclusive, hadron-level description of the
final-state. The approach relies on the POWHEG method for merging the NLO Higgs
plus jet cross-section with the parton shower, and on the MINLO method to
simultaneously achieve NLO accuracy for inclusive Higgs boson production. The
NNLO accuracy is reached by a reweighting procedure making use of the HNNLO
program.Comment: 25 pages, 10 figures. Very minor clarifications in the text for v | NNLOPS simulation of Higgs boson production | nnlops simulation of higgs boson production | boson gluon fusion matching parton shower yielding exclusive hadron state. relies powheg merging parton shower minlo simultaneously inclusive boson production. nnlo reached reweighting hnnlo pages figures. minor clarifications | non_dup | [] |
24947764 | 10.1007/JHEP10(2013)225 | Recent data on 125 GeV Higgs-like boson at the LHC starts to constrain the
electroweak symmetry breaking sector of the SM and its various extensions. If
one imposes the local gauge symmetry of the Standard Model (SM) ($SU(3)_c
\times SU(2)_L \times U(1)_Y$) to the SM and any possible new physics
scenarios, the SM Higgs properties will be modified by intrinsically two
different ways: by new physics either coupling directly to the SM Higgs boson
$h$, or affecting indirectly the SM Higgs properties through the mixing of $h$
with a SM singlet scalar $s$. The models of two Higgs doublet, extra sequential
and mirror fermions belong to the first category, whereas the models with a
hidden sector dark matter, extra vector-like fermions and new charged vector
bosons, which can enhance the diphoton rate of the SM Higgs-like resonance,
belong to the second category. We perform a global fit to data in terms of the
effective Lagrangian description of two interaction eigenstates of scalar
bosons, a SM Higgs and a singlet scalar, and their mixing. This framework is
more suitable to study singlet-extended scenarios discussed above compared to
other approaches based on the Lagrangian of mass eigenstates. With fairly
model-independent assumptions, the effective Lagrangian contains at most four
free parameters still encompassing the majority of models in the literature.
Interestingly, the SM gives the best fit if all data from ATLAS and CMS are
used, whereas various singlet extensions can fit better to individual ATLAS or
CMS data. Without further assumptions, an upper bound on the total width (or,
non-standard branching ratio) is generically obtained. Furthermore, global fit
based on our parameterization can be used to probe interactions of the singlet
scalar if the singlet resides below $2m_W$.Comment: 43 pages, 9 figures (v2: typos corrected, references added | Implications of LHC data on 125GeV Higgs-like boson for the Standard
Model and its various extensions | implications of lhc data on 125gev higgs-like boson for the standard model and its various extensions | boson starts constrain electroweak breaking extensions. imposes scenarios intrinsically ways boson affecting indirectly singlet doublet extra sequential mirror fermions belong hidden extra fermions bosons enhance diphoton belong category. lagrangian eigenstates bosons singlet mixing. singlet scenarios lagrangian eigenstates. fairly assumptions lagrangian encompassing majority literature. interestingly atlas singlet extensions atlas data. assumptions branching generically obtained. parameterization singlet singlet resides .comment pages typos corrected | non_dup | [] |
24945190 | 10.1007/JHEP10(2013)226 | We investigate models of supersymmetric grand unification based on the gauge
group SU(5). We consider models with non-universal gaugino masses and confront
them with low energy constraints, including the Higgs boson mass and the Dark
Matter relic density. We also discuss fine-tuning and show the effect of not
including the mu-parameter into fine tuning determinations. With this
relaxation, we find viable scenarios with low fine tuning and study some model
choices for gaugino mass ratios. We demonstrate that some orbifold inspired
models may provide low fine-tuning and the preferred relic abundance of Dark
Matter while evading all experimental constraints. We present benchmarks that
should be explored at the LHC and future colliders.Comment: 35 pages, 22 figures; version accepted for publicatio | Supersymmetric SU(5) Grand Unification for a Post Higgs Boson Era | supersymmetric su(5) grand unification for a post higgs boson era | supersymmetric grand unification universal gaugino confront boson relic density. fine tuning fine tuning determinations. relaxation viable scenarios fine tuning choices gaugino ratios. orbifold inspired fine tuning preferred relic abundance evading constraints. benchmarks explored pages publicatio | non_dup | [] |
24960275 | 10.1007/JHEP10(2013)228 | Finite N physics of half-BPS operators for gauge groups SO(N) and Sp(N) has
recently been studied[1, 2]. Among other things they showed that, alike U(N),
Schur operators (but in the square of their eigenvalues) diagonalize the free
field two-point function of half-BPS operators for SO(N) and Sp(N) gauge
groups. This result was unexpected since Wick contractions behave differently.
In this paper we solve the puzzle by treating all gauge groups in a unified
framework and showing how orthogonality of Schur operators emerges naturally
from the embedding structure of classical Lie algebras g(N) -> g(M). We go
further and we state that orthogonality of Schurs is a gauge group-independent
property for classical gauge groups.Comment: 33 page | Orthogonal Schurs for Classical Gauge Groups | orthogonal schurs for classical gauge groups | things alike schur eigenvalues diagonalize groups. unexpected wick contractions behave differently. solve puzzle treating unified orthogonality schur emerges naturally embedding algebras orthogonality schurs | non_dup | [] |
24941187 | 10.1007/JHEP10(2013)230 | Little Higgs models often give rise to top partners beyond the minimal ones
necessary for the cancellation of quadratic divergences. We review how this
occurs and discuss the phenomenology of these exotic states. We emphasize the
possible importance of new pseudo-Nambu-Goldstone bosons in top partner decays.
Indeed, cascade decays of exotic top partners may be the best way to discover
these new bosons. We illustrate these points with a new Little Higgs
construction based on an SO(10)/SO(5)^2 coset structure, which fills a gap in
the model building literature. These observations motivate new search
strategies for top partners at the LHC, including for final states with b-jets
and a large multiplicity of electroweak bosons.Comment: 27 pages, 2 figures, 4 tables; v3: JHEP revision -- updated to
include discussion of naturalness and section 2.1 expande | Exotic Top Partners and Little Higgs | exotic top partners and little higgs | partners cancellation quadratic divergences. phenomenology exotic states. emphasize pseudo nambu goldstone bosons partner decays. cascade decays exotic partners discover bosons. illustrate coset fills literature. motivate partners jets multiplicity electroweak pages tables jhep revision updated naturalness expande | non_dup | [] |
25037655 | 10.1007/JHEP10(2014)002 | The composite Higgs models based on the top seesaw mechanism commonly possess
an enhanced approximate chiral symmetry, which is spontaneously broken to
produce the Higgs field as the pseudo-Nambu-Goldstone bosons. The minimal model
with only one extra vector-like singlet quark that mixes with the top quark can
naturally give rise to a 126 GeV Higgs boson. However, without having a
custodial symmetry it suffers from the weak-isospin violation constraint, which
pushes the chiral symmetry breaking scale above a few TeV, causing a
substantial fine-tuning for the weak scale. We consider an extension to the
minimal model to incorporate the custodial symmetry by adding a vector-like
electroweak doublet of quarks with hypercharge +7/6. Such a setup also protects
the $Zb\bar{b}$ coupling which is another challenge for many composite Higgs
models. With this addition, the chiral symmetry breaking scale can be lowered
to around 1 TeV, making the theory much less fine-tuned. The Higgs is a
pseudo-Nambu-Goldstone boson of the broken O(5) symmetry. For the Higgs mass to
be 126 GeV, the hypercharge +7/6 quarks should be around or below the chiral
symmetry breaking scale, and are likely to be the lightest new states. The 14
TeV LHC will significantly extend the search reach of these quarks. To probe
the rest of the spectrum, on the other hand, would require a higher-energy
future collider.Comment: 35 pages, 6 figures. v2: several discussions expanded, discussion of
Higgs-gluon-gluon coupling added, references added, matches published version
in JHE | Top Seesaw with a Custodial Symmetry, and the 126 GeV Higgs | top seesaw with a custodial symmetry, and the 126 gev higgs | composite seesaw commonly possess approximate chiral spontaneously broken pseudo nambu goldstone bosons. extra singlet mixes naturally boson. custodial suffers isospin violation pushes chiral breaking causing substantial fine tuning scale. incorporate custodial adding electroweak doublet quarks hypercharge setup protects challenge composite models. chiral breaking lowered fine tuned. pseudo nambu goldstone boson broken symmetry. hypercharge quarks chiral breaking lightest states. extend quarks. pages figures. discussions expanded gluon gluon matches | non_dup | [] |
25042317 | 10.1007/JHEP10(2014)010 | Webs are weighted sets of Feynman diagrams which build up the logarithms of
correlators of Wilson lines, and provide the ingredients for the computation of
the soft anomalous dimension. We present a general analysis of multiple gluon
exchange webs (MGEWs) in correlators of semi-infinite non-lightlike Wilson
lines, as functions of the exponentials of the Minkowski cusp angles,
$\alpha_{ij}$, formed between lines $i$ and $j$. We compute a range of webs in
this class, connecting up to five Wilson lines through four loops, we give an
all-loop result for a special class of diagrams, and we discover a new kind of
relation between webs connecting different numbers of Wilson lines, based on
taking collinear limits. Our results support recent conjectures, stating that
the contribution of any MGEW to the soft anomalous dimension is a sum of
products of polylogarithms, each depending on a single cusp angle, and such
that their symbol alphabet is restricted to $\alpha_{i j}$ and $1 - \alpha_{i
j}^2$. Finally, we construct a simple basis of functions, defined through a
one-dimensional integral representation in terms of powers of logarithms, which
has all the expected analytic properties. This basis allows us to compactly
express the results of all MGEWs computed so far, and we conjecture that it is
sufficient for expressing all MGEWs at any loop order.Comment: 64 pages, 13 figures; minor changes throughou | Multiple Gluon Exchange Webs | multiple gluon exchange webs | webs weighted feynman diagrams build logarithms correlators wilson ingredients anomalous dimension. gluon webs mgews correlators infinite lightlike wilson exponentials minkowski cusp angles alpha webs connecting wilson loops diagrams discover kind webs connecting wilson collinear limits. conjectures stating mgew anomalous polylogarithms cusp symbol alphabet restricted alpha alpha powers logarithms analytic properties. compactly express mgews conjecture expressing mgews pages minor throughou | non_dup | [] |
25026647 | 10.1007/JHEP10(2014)016 | We study the global structure of the gauge group $G$ of F-theory compactified
on an elliptic fibration $Y$. The global properties of $G$ are encoded in the
torsion subgroup of the Mordell-Weil group of rational sections of $Y$.
Generalising the Shioda map to torsional sections we construct a specific
integer divisor class on $Y$ as a fractional linear combination of the
resolution divisors associated with the Cartan subalgebra of $G$. This divisor
class can be interpreted as an element of the refined coweight lattice of the
gauge group. As a result, the spectrum of admissible matter representations is
strongly constrained and the gauge group is non-simply connected. We exemplify
our results by a detailed analysis of the general elliptic fibration with
Mordell-Weil group $\mathbb Z_2$ and $\mathbb Z_3$ as well as a further
specialization to $\mathbb Z \oplus \mathbb Z_2$. Our analysis exploits the
representation of these fibrations as hypersurfaces in toric geometry.Comment: 42 pages, 10 figures; v2: references adde | Mordell-Weil Torsion and the Global Structure of Gauge Groups in
F-theory | mordell-weil torsion and the global structure of gauge groups in f-theory | compactified elliptic fibration encoded torsion subgroup mordell weil rational generalising shioda torsional integer divisor fractional divisors cartan subalgebra divisor interpreted refined coweight group. admissible representations constrained connected. exemplify elliptic fibration mordell weil mathbb mathbb specialization mathbb oplus mathbb exploits fibrations hypersurfaces toric pages adde | non_dup | [] |
35082336 | 10.1007/JHEP10(2014)017 | In this note, we employ indefinite theta functions to regularize canonical partition functions for single-center dyonic BPS black holes. These partition functions count dyonic degeneracies in the Hilbert space of four-dimensional toroidally compactified heterotic string theory, graded by electric and magnetic charges. The regularization is achieved by viewing the weighted sums of degeneracies as sums over charge excitations in the near-horizon attractor geometry of an arbitrarily chosen black hole background, and eliminating the unstable modes. This enables us to rewrite these sums in terms of indefinite theta functions. Background independence is then implemented by using the transformation property of indefinite theta functions under elliptic transformations, while modular transformations are used to make contact with semi-classical results in supergravity | Indefinite theta functions for counting attractor backgrounds | indefinite theta functions for counting attractor backgrounds | employ indefinite theta regularize canonical partition dyonic holes. partition count dyonic degeneracies hilbert toroidally compactified heterotic graded charges. regularization viewing weighted sums degeneracies sums excitations horizon attractor arbitrarily eliminating unstable modes. enables rewrite sums indefinite theta functions. independence implemented indefinite theta elliptic transformations modular transformations supergravity | non_dup | [] |
35082319 | 10.1007/JHEP10(2014)026 | We study certain small supersymmetry-breaking perturbations of a large class of strongly coupled four-dimensional R -symmetric renormalization group (RG) flows between superconformal field theories in the ultraviolet (UV) and the infrared (IR). We analyze the conditions under which these perturbations scale to zero at leading order in the deep IR, resulting in accidental supersymmetry. Furthermore, we connect the emergence of IR supersymmetry in this context with a quantity that was recently conjectured to be larger at the UV starting points of the underlying supersymmetric flows than at the corresponding IR endpoints, and we propose a bound on emergent supersymmetry. Along the way, we prove a simple and useful non-perturbative theorem regarding the IR behavior of global flavor currents. Our results suggest general ways in which light stop particles can emerge and potentially influence physics at the Large Hadron Collider | Non-perturbative constraints on light sparticles from properties of the RG flow | non-perturbative constraints on light sparticles from properties of the rg flow | supersymmetry breaking perturbations renormalization flows superconformal ultraviolet infrared analyze perturbations accidental supersymmetry. connect emergence supersymmetry quantity conjectured supersymmetric flows endpoints propose emergent supersymmetry. perturbative flavor currents. ways stop emerge potentially hadron collider | non_dup | [] |
25033987 | 10.1007/JHEP10(2014)029 | We present an exact solution of open bosonic string field theory which can be
used to describe any time-independent open string background. The solution
generalizes an earlier construction of Kiermaier, Okawa, and Soler, and assumes
the existence of boundary condition changing operators with nonsingular OPEs
and vanishing conformal dimension. Our main observation is that boundary
condition changing operators of this kind can describe nearly any open string
background provided the background shift is accompanied by a timelike Wilson
line of sufficient strength. As an application we analyze the tachyon lump
describing the formation of a D$(p-1)$-brane in the string field theory of a
D$p$-brane, for generic compactification radius. This not only provides a proof
of Sen's second conjecture, but also gives explicit examples of higher energy
solutions, confirming analytically that string field theory can "reverse" the
direction of the worldsheet RG flow. We also find multiple D-brane solutions,
demonstrating that string field theory can add Chan-Paton factors and change
the rank of the gauge group. Finally, we show how the solution provides a
remarkably simple and nonperturbative proof of the background independence of
open bosonic string field theory.Comment: V2: 42 pages, 11 figures, typos correcte | String Field Theory Solution for Any Open String Background | string field theory solution for any open string background | bosonic background. generalizes kiermaier okawa soler assumes changing nonsingular opes vanishing conformal dimension. changing kind nearly accompanied timelike wilson strength. analyze tachyon lump describing brane brane generic compactification radius. conjecture confirming analytically reverse worldsheet flow. brane demonstrating chan paton group. remarkably nonperturbative independence bosonic pages typos correcte | non_dup | [] |
35082318 | 10.1007/JHEP10(2014)039 | We explore the phase structure of fermions in the U(N) Chern-Simons Gauge theory in three dimensions using the large N limit where N is the number of colors and the fermions are taken to be in the fundamental representation of the U(N) gauge group. In the large N limit, the theory retains its classical conformal behavior and considerable attention has been paid to possible AdS/CFT dualities of the theory in the conformal phase. In this paper we present a solution for the massive phase of the fermion theory that is exact to the leading order of ‘t Hooft’s large N expansion. We present evidence for the spontaneous breaking of the exact scale symmetry and analyze the properties of the dilaton that appears as the Goldstone boson of scale symmetry breaking | The massive fermion phase for the U(N) Chern-Simons gauge theory in D=3 at large N | the massive fermion phase for the u(n) chern-simons gauge theory in d=3 at large n | explore fermions chern simons colors fermions group. retains conformal considerable paid dualities conformal phase. massive fermion hooft’s expansion. spontaneous breaking analyze dilaton goldstone boson breaking | non_dup | [] |
25037333 | 10.1007/JHEP10(2014)044 | We determine the complete set of independent gauge and gauge-Higgs CP-odd
effective operators for the generic case of a dynamical Higgs, up to four
derivatives in the chiral expansion. The relation with the linear basis of
dimension six CP-odd operators is clarified. Phenomenological applications
include bounds inferred from electric dipole moment limits, and from present
and future collider data on triple gauge coupling measurements and Higgs
signals.Comment: 41 pages, 3 figures; V2: citations added, typos corrected, version
published on JHE | CP violation with a dynamical Higgs | cp violation with a dynamical higgs | generic derivatives chiral expansion. clarified. phenomenological bounds inferred dipole moment collider triple pages citations typos corrected | non_dup | [] |
35082317 | 10.1007/JHEP10(2014)045 | There is an increasing interest in accurate dark matter relic density predictions, which requires next-to-leading order (NLO) calculations. The method applied up to now uses zero-temperature NLO calculations of annihilation cross sections in the standard Boltzmann equation for freeze-out, and is conceptually problematic, since it ignores the finite-temperature infrared (IR) divergences from soft and collinear radiation and virtual effects. We address this problem systematically by starting from non-equilibrium quantum field theory, and demonstrate on a realistic model that soft and collinear temperature-dependent divergences cancel in the collision term. Our analysis provides justification for the use of the freeze-out equation in its conventional form and determines the leading finite-temperature correction to the annihilation cross section. This turns out to have a remarkably simple structure | Relic density computations at NLO: infrared finiteness and thermal correction | relic density computations at nlo: infrared finiteness and thermal correction | relic calculations. annihilation boltzmann freeze conceptually problematic ignores infrared divergences collinear virtual effects. systematically realistic collinear divergences cancel collision term. justification freeze determines annihilation section. turns remarkably | non_dup | [] |
25044963 | 10.1007/JHEP10(2014)047 | Motivated by the recent LHC Higgs data and null results in searches for any
new physics, we investigate the Higgs couplings and naturalness in the littlest
Higgs model with T-parity. By performing the global fit of the latest Higgs
data, electroweak precise observables and $R_{b}$ measurements, we find that
the scale $f$ can be excluded up to 600 GeV at $2\sigma$ confidence level. The
expected Higgs coupling measurements at the future collider TLEP will improve
this lower limit to above 3 TeV. Besides, the top parnter mass $m_{T_{+}}$ can
be excluded up to 880 GeV at $2\sigma$ confidence level. The future HL-LHC can
constrain this mass in the region $m_{T_{+}} < 2.2$ TeV corresponding to the
fine-tuning being lager than 1%.Comment: published version (to appear in JHEP | Higgs couplings and Naturalness in the littlest Higgs model with
T-parity at the LHC and TLEP | higgs couplings and naturalness in the littlest higgs model with t-parity at the lhc and tlep | motivated searches couplings naturalness littlest parity. performing latest electroweak precise observables excluded sigma confidence level. collider tlep tev. besides parnter excluded sigma confidence level. constrain fine tuning lager .comment jhep | non_dup | [] |
25045113 | 10.1007/JHEP10(2014)048 | We revisit the issues of non-linear AdS stability, its relation to growing
(secular) terms in naive perturbation theory around the AdS background, and the
need and possible strategies for resumming such terms. To this end, we review a
powerful and elegant resummation method, which is mathematically identical to
the standard renormalization group treatment of ultraviolet divergences in
perturbative quantum field theory. We apply this method to non-linear
gravitational perturbation theory in the AdS background at first non-trivial
order and display the detailed structure of the emerging renormalization flow
equations. We prove, in particular, that a majority of secular terms (and the
corresponding terms in the renormalization flow equations) that could be
present on general grounds given the spectrum of frequencies of linear AdS
perturbations, do not in fact arise.Comment: v2: 32 pages, substantial comments added, references added, minor
typos correcte | Renormalization group, secular term resummation and AdS (in)stability | renormalization group, secular term resummation and ads (in)stability | revisit growing secular naive perturbation resumming terms. powerful elegant resummation mathematically renormalization ultraviolet divergences perturbative theory. gravitational perturbation trivial display emerging renormalization equations. majority secular renormalization grounds perturbations pages substantial comments minor typos correcte | non_dup | [] |
25025678 | 10.1007/JHEP10(2014)049 | Motivated by the recent proposal for the S-matrix in $AdS_3\times S^3$ with
mixed three form fluxes, we study classical folded string spinning in $AdS_3$
with both Ramond and Neveu-Schwarz three form fluxes. We solve the equations of
motion of these strings and obtain their dispersion relation to the leading
order in the Neveu-Schwarz flux $b$. We show that dispersion relation for the
spinning strings with large spin ${\cal S}$ acquires a term given by
$-\frac{\sqrt{\lambda}}{2\pi} b^2\log^2 {\cal S}$ in addition to the usual
$\frac{\sqrt\lambda}{\pi} \log {\cal S}$ term where $\sqrt{\lambda}$ is
proportional to the square of the radius of $AdS_3$. Using SO(2,2)
transformations and re-parmetrizations we show that these spinning strings can
be related to light like Wilson loops in $AdS_3$ with Neveu-Schwarz flux $b$.
We observe that the logarithmic divergence in the area of the light like Wilson
loop is also deformed by precisely the same coefficient of the $ b^2 \log^2
{\cal S}$ term in the dispersion relation of the spinning string. This result
indicates that the coefficient of $ b^2 \log^2 {\cal S}$ has a property similar
to the coefficient of the $\log {\cal S}$ term, known as cusp-anomalous
dimension, and can possibly be determined to all orders in the coupling
$\lambda$ using the recent proposal for the S-matrix.Comment: 34 pages, Accepted for publication in JHE | Spinning strings and minimal surfaces in $AdS_3$ with mixed 3-form
fluxes | spinning strings and minimal surfaces in $ads_3$ with mixed 3-form fluxes | motivated proposal fluxes folded spinning ramond neveu schwarz fluxes. solve strings neveu schwarz spinning strings acquires frac sqrt lambda usual frac sqrt lambda sqrt lambda transformations parmetrizations spinning strings wilson loops neveu schwarz logarithmic divergence wilson deformed precisely spinning string. cusp anomalous possibly orders lambda proposal pages publication | non_dup | [] |
35082308 | 10.1007/JHEP10(2014)051 | We revisit the notion of particle-vortex duality in abelian theories of complex scalar fields coupled to gauge fields, formulating the duality as a transformation at the level of the path integral. This transformation is then made symmetric and cast as a self-duality that maps the original theory into itself with the role of particles and vortices interchanged. After defining the transformation for a pure Chern-Simons gauge theory, we show how to embed it into (a sector of) the (2 + 1)-dimensional ABJM model, and argue that this duality can be understood as being related to 4-dimensional Maxwell duality in the AdS 4 × ℂ ℙ 3 bulk | Particle-vortex and Maxwell duality in the AdS 4 × ℂ ℙ 3 /ABJM correspondence | particle-vortex and maxwell duality in the ads 4 × ℂ ℙ 3 /abjm correspondence | revisit notion vortex duality abelian formulating duality integral. cast duality vortices interchanged. defining chern simons embed abjm argue duality understood maxwell duality | non_dup | [] |
24931784 | 10.1007/JHEP10(2014)057 | We study the flavor-changing couplings of the Higgs-boson with the top-quark
using the processes: (a) pp --> tt, (b) pp --> t_bar j, and, (c) pp --> t_bar j
h at the LHC in light of current discovery of a 126 GeV Higgs-Boson.
Sensitivities for the flavor-changing couplings are estimated using the LHC
data that was collected until spring 2013. It is found that the process (c) is
the most capable of yielding the best upper bound on the flavor-changing
couplings with 2 sigma level sensitivities of {|xi_{tc}^2 + xi_{tu}^2|}^{1/2}
<= 4.2 x 10^{-3} and <= 1.7 x 10^{-3} resulting from t --> b l nu_l, h --> jj
with the 7 TeV and 8 TeV centre-of-mass energies respectively using existing
data from the LHC. The corresponding bounds from h --> b b_bar are worse by a
factor of about 1.8.Comment: 19 Latex Pages, 2 Figures, 6 Tables, More SM backgrounds, corrected
some typos and errors, added h->2j detection mode, further improvements and a
new subsection on 14 TeV was added. More refs. were incorporate | Constraining the flavor changing Higgs couplings to the top-quark at the
LHC | constraining the flavor changing higgs couplings to the top-quark at the lhc | flavor changing couplings boson discovery boson. sensitivities flavor changing couplings spring capable yielding flavor changing couplings sigma sensitivities lhc. bounds worse latex pages tables backgrounds corrected typos improvements subsection added. refs. incorporate | non_dup | [] |
35084284 | 10.1007/JHEP10(2014)058 | We study the total cross section for the collision of two highly-virtual photons at large energies, taking into account the BFKL resummation of energy logarithms with full next-to-leading accuracy. A necessary ingredient of the calculation, the next-to-leading order impact factor for the photon to photon transition, has been calculated by Balitsky and Chirilli using an approach based on the operator expansion in Wilson lines. We extracted the result for the photon impact factor in the original BFKL calculation scheme comparing the expression for the photon-photon total cross section obtained in BFKL with the one recently derived by Chirilli and Kovchegov in the Wilson-line operator expansion scheme | The γ * γ * total cross section in next-to-leading order BFKL and LEP2 data | the γ * γ * total cross section in next-to-leading order bfkl and lep2 data | collision virtual photons bfkl resummation logarithms accuracy. ingredient balitsky chirilli wilson lines. bfkl bfkl chirilli kovchegov wilson | non_dup | [] |
25044853 | 10.1007/JHEP10(2014)059 | We propose a new method for pileup mitigation by implementing "pileup per
particle identification" (PUPPI). For each particle we first define a local
shape $\alpha$ which probes the collinear versus soft diffuse structure in the
neighborhood of the particle. The former is indicative of particles originating
from the hard scatter and the latter of particles originating from pileup
interactions. The distribution of $\alpha$ for charged pileup, assumed as a
proxy for all pileup, is used on an event-by-event basis to calculate a weight
for each particle. The weights describe the degree to which particles are
pileup-like and are used to rescale their four-momenta, superseding the need
for jet-based corrections. Furthermore, the algorithm flexibly allows
combination with other, possibly experimental, probabilistic information
associated with particles such as vertexing and timing performance. We
demonstrate the algorithm improves over existing methods by looking at jet
$p_T$ and jet mass. We also find an improvement on non-jet quantities like
missing transverse energy.Comment: v2 - 23 pages, 10 figures; update to JHEP version, minor revisions
throughout, results unchange | Pileup Per Particle Identification | pileup per particle identification | propose pileup mitigation implementing pileup puppi alpha probes collinear diffuse neighborhood particle. former indicative originating scatter originating pileup interactions. alpha pileup proxy pileup particle. weights pileup rescale momenta superseding corrections. flexibly possibly probabilistic vertexing timing performance. improves looking mass. quantities missing pages update jhep minor revisions unchange | non_dup | [] |
33617271 | 10.1007/JHEP10(2014)064 | First observations of the rare decays $B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\rightarrow \phi K^+\mu^+\mu^-$ are presented using data corresponding to an integrated luminosity of $3.0\,{fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $7$ and $8\mathrm{\,TeV}$. The branching fractions of the decays are \begin{eqnarray*} \mathcal{B}(B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-) &=&\ud
(4.36\,^{+0.29}_{-0.27}\,\mathrm{(stat)}\pm 0.21\,\mathrm{(syst)}\pm0.18\,\mathrm{(norm)})\times10^{-7},\\\ud
\mathcal{B}(B^+\rightarrow\phi K^+\mu^+\mu^-) &=& (0.82\,^{+0.19}_{-0.17}\,\mathrm{(stat)} ,^{+0.10}_{-0.04}\,\mathrm{(syst)}\pm0.27\,\mathrm{(norm)})\times10^{-7},\end{eqnarray*} where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay $B^+\rightarrow K^+\pi^+\pi^-\mu^{+}\mu^{-} | First observations of the rare decays B+−>K+π+π−μ+μ− and B+−>φK+μ+μ− | first observations of the rare decays b+−>k+π+π−μ+μ− and b+−>φk+μ+μ− | rare decays rightarrow rightarrow luminosity lhcb mathrm branching fractions decays begin eqnarray mathcal rightarrow mathrm stat mathrm syst mathrm norm mathcal rightarrow mathrm stat mathrm syst mathrm norm eqnarray branching fractions normalisation modes. branching bins squared dimuon rightarrow | non_dup | [] |
25048894 | 10.1007/JHEP10(2014)065 | We extend the hexagon function bootstrap to the
next-to-maximally-helicity-violating (NMHV) configuration for six-point
scattering in planar ${\cal N}=4$ super-Yang-Mills theory at three loops.
Constraints from the $\bar{Q}$ differential equation, from the operator product
expansion (OPE) for Wilson loops with operator insertions, and from multi-Regge
factorization, lead to a unique answer for the three-loop ratio function. The
three-loop result also predicts additional terms in the OPE expansion, as well
as the behavior of NMHV amplitudes in the multi-Regge limit at one higher
logarithmic accuracy (NNLL) than was used as input. Both predictions are in
agreement with recent results from the flux-tube approach. We also study the
multi-particle factorization of multi-loop amplitudes for the first time. We
find that the function controlling this factorization is purely logarithmic
through three loops. We show that a function $U$, which is closely related to
the parity-even part of the ratio function $V$, is remarkably simple; only five
of the nine possible final entries in its symbol are non-vanishing. We study
the analytic and numerical behavior of both the parity-even and parity-odd
parts of the ratio function on simple lines traversing the space of cross
ratios $(u,v,w)$, as well as on a few two-dimensional planes. Finally, we
present an empirical formula for $V$ in terms of elements of the coproduct of
the six-gluon MHV remainder function $R_6$ at one higher loop, which works
through three loops for $V$ (four loops for $R_6$).Comment: 69 pages, 12 figures, 1 table, 3 ancillary files; v2, minor typo's
correcte | Bootstrapping an NMHV amplitude through three loops | bootstrapping an nmhv amplitude through three loops | extend hexagon bootstrap maximally helicity violating nmhv planar super mills loops. wilson loops insertions regge factorization answer function. predicts nmhv amplitudes regge logarithmic nnll input. tube approach. factorization amplitudes time. controlling factorization purely logarithmic loops. closely parity remarkably nine entries symbol vanishing. analytic parity parity traversing planes. coproduct gluon remainder loops loops .comment pages ancillary files minor typo correcte | non_dup | [] |
25026649 | 10.1007/JHEP10(2014)067 | As we have shown in previous work, the high energy limit of scattering
amplitudes in N=4 supersymmetric Yang-Mills theory corresponds to the infrared
limit of the 1-dimensional quantum integrable system that solves minimal area
problems in AdS5. This insight can be developed into a systematic algorithm to
compute the strong coupling limit of amplitudes in the multi-Regge regime
through the solution of auxiliary Bethe Ansatz equations. We apply this
procedure to compute the scattering amplitude for n=7 external gluons in
different multi-Regge regions at infinite 't Hooft coupling. Our formulas are
remarkably consistent with the expected form of 7-gluon Regge cut contributions
in perturbative gauge theory. A full description of the general algorithm and a
derivation of results will be given in a forthcoming paper.Comment: 14 page | Heptagon Amplitude in the Multi-Regge Regime | heptagon amplitude in the multi-regge regime | amplitudes supersymmetric mills infrared integrable solves insight amplitudes regge auxiliary bethe ansatz equations. gluons regge infinite hooft coupling. formulas remarkably gluon regge perturbative theory. derivation forthcoming | non_dup | [] |
25042163 | 10.1007/JHEP10(2014)068 | A problem of self-energy and self-force for a charged point-like particle in
a higher dimensional homogeneous gravitational field is considered. We study
two cases, when a particle has usual electric charge and a case when it has a
scalar charge, which is a source of a scalar massless minimally coupled field.
We assume that a particle is at rest in the gravitational field, so that its
motion is not geodesic and it has an acceleration a directed from the horizon.
The self-energy of a point charge is divergent and the strength of the
divergence grows with the number of dimensions. In order to obtain a finite
contribution to the self- energy we use a covariant regularization method which
is a modification of the proper time cut-off and other covariant
regularizations. We analyze a relation between the self-energy and self-force
and obtain explicit expressions for the self-forces for the electric and scalar
charge in the spacetimes with the number of dimensions up to eight. General
expressions for the case of higher dimensions are also obtained. We discuss
special logarithmic factors ln(a), which are present both in the self-energy
and self-force in odd dimensions. Finally, we compare the obtained results with
the earlier known results both for the homogeneous gravitational field and for
particles near black holes.Comment: 43 pages, two subsections added, a few tables and references adde | Charged particles in higher dimensional homogeneous gravitational field:
Self-energy and self-force | charged particles in higher dimensional homogeneous gravitational field: self-energy and self-force | homogeneous gravitational considered. usual massless minimally field. gravitational geodesic acceleration directed horizon. divergent divergence grows dimensions. covariant regularization modification proper covariant regularizations. analyze expressions forces spacetimes eight. expressions obtained. logarithmic dimensions. homogeneous gravitational pages subsections tables adde | non_dup | [] |
25016048 | 10.1007/JHEP10(2014)069 | A new method for obtaining dual string theory backgrounds is presented.
Preservation of the Hamiltonian density and the energy momentum tensor induced
by O(d,d)-transformations leads to a relation between dual sets of coordinate
one-forms accompanied by a redefinition of the background fields and a shift of
the dilaton. The necessity of isometric directions arises as integrability
condition for this map. The isometry algebra is studied in detail using
generalised geometry. In particular, non-abelian dualities and
beta-transformations are contained in this approach. The latter are exemplified
by the construction of a new approximate non-geometric background.Comment: 19+5 pages; v2: minor corrections and references added; v3: comments
and references adde | O(d,d)-Duality in String Theory | o(d,d)-duality in string theory | obtaining backgrounds presented. preservation transformations coordinate accompanied redefinition dilaton. necessity isometric directions arises integrability map. isometry generalised geometry. abelian dualities beta transformations approach. exemplified approximate geometric pages minor comments adde | non_dup | [] |
25021390 | 10.1007/JHEP10(2014)070 | In some string theories, e.g. SO(32) heterotic string theory on Calabi-Yau
manifolds, a massless field with a tree level potential can acquire a tachyonic
mass at the one loop level, forcing us to quantize the theory around a new
background that is not a solution to the classical equations of motion and
hence is not described by a conformally invariant world-sheet theory. We
describe a systematic procedure for carrying out string perturbation theory
around such backgrounds.Comment: LaTeX file, 24 pages; v2: reference adde | String Perturbation Theory Around Dynamically Shifted Vacuum | string perturbation theory around dynamically shifted vacuum | e.g. heterotic calabi manifolds massless acquire tachyonic forcing quantize conformally sheet theory. carrying perturbation latex file pages adde | non_dup | [] |
35084379 | 10.1007/JHEP10(2014)071 | We consider the production of η c and χ cJ states recoiled with a photon up-to O α s v 2 $$ \mathcal{O}\left({\alpha}_s{v}^2\right) $$ at BESIII and B-factories within the frame of NRQCD factorization. With the corrections, we revisit the numerical calculations to the cross sections for η c ( nS ) and χ cJ ( mP ) states. We argue that the search for XY Z states with even charge conjugation such as X (3872) X (3940) X (4160), and X (4350) recoiled with a photon at BESIII may help clarify the nature of these states. For completeness, the production of charmonium with even charge conjugation recoiled with a photon at B factories is also discussed | α s v 2 corrections to η c and χ cJ production recoiled with a photon at e + e − colliders | α s v 2 corrections to η c and χ cj production recoiled with a photon at e + e − colliders | recoiled mathcal alpha besiii factories nrqcd factorization. revisit states. argue conjugation recoiled besiii clarify states. completeness charmonium conjugation recoiled factories | non_dup | [] |
25029700 | 10.1007/JHEP10(2014)072 | We study the interplay of flavor and dark matter phenomenology for models of
flavored dark matter interacting with quarks. We allow an arbitrary flavor
structure in the coupling of dark matter with quarks. This coupling is assumed
to be the only new source of violation of the Standard Model flavor symmetry
extended by a $U(3)_\chi$ associated with the dark matter. We call this ansatz
Dark Minimal Flavor Violation (DMFV) and highlight its various implications,
including an unbroken discrete symmetry that can stabilize the dark matter. As
an illustration we study a Dirac fermionic dark matter $\chi$ which transforms
as triplet under $U(3)_\chi$, and is a singlet under the Standard Model. The
dark matter couples to right-handed down-type quarks via a colored scalar
mediator $\phi$ with a coupling $\lambda$. We identify a number of
"flavor-safe" scenarios for the structure of $\lambda$ which are beyond Minimal
Flavor Violation. For dark matter and collider phenomenology we focus on the
well-motivated case of $b$-flavored dark matter. The combined flavor and dark
matter constraints on the parameter space of $\lambda$ turn out to be
interesting intersections of the individual ones. LHC constraints on simplified
models of squarks and sbottoms can be adapted to our case, and monojet searches
can be relevant if the spectrum is compressed.Comment: 40 pages, 19 figures, 3 tables. Clarifying comments and some
references added, matches published versio | Flavored dark matter beyond Minimal Flavor Violation | flavored dark matter beyond minimal flavor violation | interplay flavor phenomenology flavored interacting quarks. flavor quarks. violation flavor matter. call ansatz flavor violation dmfv highlight unbroken stabilize matter. illustration dirac fermionic transforms triplet singlet model. couples handed quarks colored mediator lambda flavor safe scenarios lambda flavor violation. collider phenomenology motivated flavored matter. flavor lambda intersections ones. simplified squarks sbottoms adapted monojet searches pages tables. clarifying comments matches versio | non_dup | [] |
25043894 | 10.1007/JHEP10(2014)073 | The effect of parton energy loss in cold nuclear matter on the suppression of
quarkonia (J/psi, Upsilon) in heavy-ion collisions is investigated, by
extrapolating a model based on coherent radiative energy loss recently shown to
describe successfully J/psi and Upsilon suppression in proton-nucleus
collisions. Model predictions in heavy-ion collisions at RHIC (Au-Au, Cu-Cu,
and Cu-Au) and LHC (Pb-Pb) show a sizable suppression arising from the sole
effect of energy loss in cold matter. This effect should thus be considered in
order to get a reliable baseline for cold nuclear matter effects in quarkonium
suppression in heavy-ion collisions, in view of disentangling hot from cold
nuclear effects.Comment: 20 pages, 9 figure | Quarkonium suppression in heavy-ion collisions from coherent energy loss
in cold nuclear matter | quarkonium suppression in heavy-ion collisions from coherent energy loss in cold nuclear matter | parton cold suppression quarkonia upsilon collisions extrapolating coherent radiative successfully upsilon suppression proton nucleus collisions. collisions rhic sizable suppression arising sole cold matter. reliable cold quarkonium suppression collisions disentangling cold pages | non_dup | [] |
25031632 | 10.1007/JHEP10(2014)075 | In this paper we present a first order formulation for non-extremal Anti-de
Sitter black hole solutions in four dimensional $\mathcal{N}=2$ U(1)-gauged
Supergravity. The dynamics is determined in terms of a quantity $\mathcal{W}$
which plays the role of a superpotential for the gauging potential in the
action. We show how the first order flow arises from writing the action as a
sum of squares and we identify the superpotential driving the first order flow
for two classes of solutions (electric and magnetic) of the $t^3$ model. After
identifying $\mathcal{W}$, we study the Hamilton-Jacobi holographic
renormalization procedure in presence of mixed boundary conditions for the
scalar fields. We compute the renormalized on-shell action and the mass of the
black hole configurations. The expression obtained for the mass satisfies the
first law of thermodynamics.Comment: 36 pages, v3: renormalized free energy expression corrected,
comparison of the on-shell action between electric and magnetic solution
adde | First order flow for non-extremal AdS black holes and mass from
holographic renormalization | first order flow for non-extremal ads black holes and mass from holographic renormalization | formulation extremal sitter mathcal gauged supergravity. quantity mathcal plays superpotential gauging action. arises writing squares superpotential driving model. identifying mathcal hamilton jacobi holographic renormalization fields. renormalized configurations. satisfies pages renormalized corrected adde | non_dup | [] |
25038625 | 10.1007/JHEP10(2014)077 | According to Ryu and Takayanagi, the entanglement entropy in conformal field
theory (CFT) is related through the AdS/CFT correspondence to the area of a
minimal surface in the bulk. We study this holographic geometrical method of
calculating the entanglement entropy in the vacuum case of a CFT which is
holographically dual to empty anti-de Sitter (AdS) spacetime. Namely, we
investigate the minimal surfaces spanned on boundaries of spherical domains at
infinity of hyperbolic space, which represents a time-slice of AdS spacetime.
We consider a generic position of two spherical domains: two disjoint domains,
overlapping domains, and touching domains. In all these cases we find the
explicit expressions for the minimal surfaces and the renormalized expression
for the area. We study also the embedding of the minimal surfaces into full AdS
spacetime and we find that for a proper choice of the static Killing vector we
can model a dynamical situation of "tearing" of the minimal surface when the
domains on which it is spanned are moved away from each other.Comment: 36 pages, 21 figures, for version with high-resolution figures see
http://utf.mff.cuni.cz/~krtous/papers | Minimal surfaces and entanglement entropy in anti-de Sitter space | minimal surfaces and entanglement entropy in anti-de sitter space | takayanagi entanglement conformal correspondence bulk. holographic geometrical calculating entanglement holographically empty sitter spacetime. spanned boundaries spherical infinity hyperbolic slice spacetime. generic spherical disjoint overlapping touching domains. expressions renormalized area. embedding spacetime proper killing tearing spanned moved away pages utf.mff.cuni.cz krtous papers | non_dup | [] |
25056143 | 10.1007/JHEP10(2014)081 | Motivated by the Extremal Vanishing Horizon (EVH) black holes, their near
horizon geometry and the EVH/CFT proposal, we construct and classify solutions
with (local) SO(2,2) symmetry to four and five dimensional
Einstein-Maxwell-Dilaton (EMD) theory with positive, zero or negative
cosmological constant Lambda, the EMD-$\Lambda$ theory, and also $U(1)^4$
gauged supergravity in four dimensions and $U(1)^3$ gauged supergravity in five
dimensions. In four dimensions the geometries are warped product of AdS3 with
an interval or a circle. In five dimensions the geometries are of the form of
warped product of AdS3 and a 2d surface $\Sigma_2$. For the
Einsten-Maxwell-$\Lambda$ theory we prove that $\Sigma_2$ should have a U(1)
isometry, a rigidity theorem in this class of solutions. We also construct all
d dimensional Einstein vacuum solutions with $SO(2,2) \times U(1)^{d-4}$ or
$SO(2,2) \times SO(d-3)$ isometry.Comment: 26 pages, updated to published versio | On Classification of Geometries with SO(2,2) Symmetry | on classification of geometries with so(2,2) symmetry | motivated extremal vanishing horizon holes horizon proposal classify einstein maxwell dilaton cosmological lambda lambda gauged supergravity gauged supergravity dimensions. geometries warped circle. geometries warped sigma einsten maxwell lambda sigma isometry rigidity solutions. einstein pages updated versio | non_dup | [] |
25046842 | 10.1007/JHEP10(2014)082 | The domain of outer communication of five-dimensional asymptotically flat
stationary spacetimes may possess non-trivial 2-cycles. We discuss how this may
lead to a gross violation of black hole uniqueness, beyond the existence of
black rings, even for solutions with two commuting rotational symmetries. We
illustrate this with a simple example in minimal supergravity; a four parameter
family of supersymmetric black hole solutions, with spherical horizon topology
and a 2-cycle in the exterior. We show there are black holes in this family
with identical conserved changes to the BMPV black hole, thereby demonstrating
black hole non-uniqueness in this context. We find a decoupling limit of this
family of black holes that yields spacetimes asymptotic to the near-horizon
geometry of a BMPV black hole which contain a black hole and an exterior
2-cycle.Comment: 24 pages. v2: minor additions, published version. v3: corrected
physical quantities, results unaffected, differs from published versio | Black hole non-uniqueness via spacetime topology in five dimensions | black hole non-uniqueness via spacetime topology in five dimensions | outer asymptotically stationary spacetimes possess trivial cycles. gross violation uniqueness rings commuting rotational symmetries. illustrate supergravity supersymmetric spherical horizon topology exterior. holes conserved bmpv thereby demonstrating uniqueness context. decoupling holes spacetimes asymptotic horizon bmpv exterior pages. minor additions version. corrected quantities unaffected differs versio | non_dup | [] |
35084381 | 10.1007/JHEP10(2014)086 | The Double Chooz experiment presents improved measurements of the neutrino mixing angle θ 13 using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the ν ¯ e $$ {\overline{\nu}}_e $$ signal has increased. The value of θ 13 is measured to be sin 2 2 θ 13 = 0.090 − 0.029 + 0.032 from a fit to the observed energy spectrum. Deviations from the reactor ν ¯ e $$ {\overline{\nu}}_e $$ prediction observed above a prompt signal energy of 4 MeV and possible explanations are also reported. A consistent value of θ 13 is obtained from a fit to the observed rate as a function of the reactor power independently of the spectrum shape and background estimation, demonstrating the robustness of the θ 13 measurement despite the observed distortion | Improved measurements of the neutrino mixing angle θ 13 with the Double Chooz detector | improved measurements of the neutrino mixing angle θ 13 with the double chooz detector | chooz presents live positioned reactor cores chooz plant. reductions backgrounds publications overline increased. spectrum. deviations reactor overline prompt explanations reported. reactor independently demonstrating robustness distortion | non_dup | [] |
33617152 | 10.1007/JHEP10(2014)088 | The production of $\chi_b$ mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of $\sqrt{s}=7$ and $8$ TeV and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. The $\chi_b$ mesons are identified through their decays to $\Upsilon(1S)\gamma$ and $\Upsilon(2S)\gamma$ using photons that converted to $e^+e^-$ pairs in the detector. The relative prompt production rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ mesons is measured as a function of the $\Upsilon(1S)$ transverse momentum in the $\chi_b$ rapidity range $2.0<y<4.5$. A precise measurement of the $\chi_b(3P)$ mass is also performed. Assuming a mass splitting between the $\chi_{b1}(3P)$ and the $\chi_{b2}(3P)$ states of 10.5 MeV/$c^2$, the measured mass of the $\chi_{b1}(3P)$ meson is $ m(\chi_{b1}(3P))= 10515.7^{+2.2}_{-3.9}(stat) ^{+1.5}_{-2.1}(syst) MeV/c^2. | Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production | measurement of the $\chi_b(3p)$ mass and of the relative rate of $\chi_{b1}(1p)$ and $\chi_{b2}(1p)$ production | mesons proton proton collisions lhcb sqrt luminosity mesons decays upsilon gamma upsilon gamma photons converted detector. prompt mesons upsilon rapidity precise performed. splitting meson stat syst | non_dup | [] |
24933953 | 10.1007/JHEP10(2014)091 | We determine the Clebsch-Gordan and Racah-Wigner coefficients for continuous
series of representations of the quantum deformed algebras U_q(sl(2)) and
U_q(osp(1|2)). While our results for the former algebra reproduce formulas by
Ponsot and Teschner, the expressions for the orthosymplectic algebra are new.
Up to some normalization factors, the associated Racah-Wigner coefficients are
shown to agree with the fusing matrix in the Neveu-Schwarz sector of N=1
supersymmetric Liouville field theory.Comment: 36 page | Self-dual Continuous Series of Representations for U_q(sl(2)) and
U_q(osp(1|2)) | self-dual continuous series of representations for u_q(sl(2)) and u_q(osp(1|2)) | clebsch gordan racah wigner representations deformed algebras former reproduce formulas ponsot teschner expressions orthosymplectic new. normalization racah wigner agree fusing neveu schwarz supersymmetric liouville | non_dup | [] |
33617257 | 10.1007/JHEP10(2014)097 | A binned Dalitz plot analysis of $B^\pm \to D K^\pm$ decays, with $D \to K_S \pi^+\pi^-$ and $D \to K_S K^+ K^-$, is performed to measure the \CP-violating observables $x_{\pm}$ and $y_{\pm}$, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle $\gamma$. The analysis exploits a sample of proton-proton collision data corresponding to 3.0\invfb collected by the LHCb experiment. Measurements from CLEO-c of the variation of the strong-interaction phase of the $D$ decay over the Dalitz plot are used as inputs. The values of the parameters are found to be $x_+ = (-7.7 \pm 2.4 \pm 1.0 \pm 0.4)\times 10^{-2}$, $x_- = (2.5 \pm 2.5 \pm 1.0 \pm 0.5) \times 10^{-2}$, $y_+ = (-2.2 \pm 2.5 \pm 0.4 \pm 1.0)\times 10^{-2}$, and $y_- = (7.5 \pm 2.9 \pm 0.5 \pm 1.4) \times 10^{-2}$. The first, second, and third uncertainties are the statistical, the experimental systematic, and that associated with the precision of the strong-phase parameters. These are the most precise measurements of these observables and correspond to $\gamma = (62^{\,+15}_{\,-14})^\circ$, with a second solution at $\gamma \to \gamma + 180^\circ$, and $r_B = 0.080^{+ 0.019}_{-0.021}$, where $r_B$ is the ratio between the suppressed and favoured $B$ decay amplitudes | Measurement of the CKM angle γ using B ± → DK ± with D → K S 0 π + π −, K S 0 K + K − decays | measurement of the ckm angle γ using b ± → dk ± with d → k s 0 π + π −, k s 0 k + k − decays | binned dalitz decays violating observables cabibbo kobayashi maskawa gamma exploits proton proton collision invfb lhcb experiment. cleo dalitz inputs. precision parameters. precise observables gamma circ gamma gamma circ suppressed favoured amplitudes | non_dup | [] |
35084450 | 10.1007/JHEP10(2014)102 | We explore naturalness constraints on the masses of the heavy Higgs bosons H 0 , H ± , and A 0 in supersymmetric theories. We show that, in any extension of MSSM which accommodates the 125 GeV Higgs at the tree level, one can derive an upper bound on the SUSY Higgs masses from naturalness considerations. As is well-known for the MSSM, these bounds become weak at large tan β . However, we show that measurements of b → s γ together with naturalness arguments lead to an upper bound on tan β , strengthening the naturalness case for heavy Higgs states near the TeV scale. The precise bound depends somewhat on the SUSY mediation scale: allowing a factor of 10 tuning in the stop sector, the measured rate of b → sγ implies tan β ≲ 30 for running down from 10 TeV but tan β ≲ 4 for mediation at or above 100 TeV, placing m A near the TeV scale for natural EWSB. Because the signatures of heavy Higgs bosons at colliders are less susceptible to being “hidden” than standard superpartner signatures, there is a strong motivation to make heavy Higgs searches a key part of the LHC’s search for naturalness. In an appendix we comment on how the Goldstone boson equivalence theorem links the rates for H → hh and H → ZZ signatures | Naturalness, b → sγ , and SUSY heavy Higgses | naturalness, b → sγ , and susy heavy higgses | explore naturalness bosons supersymmetric theories. mssm accommodates derive susy naturalness considerations. mssm bounds naturalness arguments strengthening naturalness scale. precise somewhat susy mediation allowing tuning stop running mediation placing ewsb. signatures bosons colliders susceptible “hidden” superpartner signatures motivation searches lhc’s naturalness. comment goldstone boson equivalence links signatures | non_dup | [] |
35084435 | 10.1007/JHEP10(2014)105 | We test the utility of the 2PI formalism for solving nonperturbative dynamics of gauge theories by applying it to study the phase diagram of SU( N ) Higgs theory in 3 Euclidean spacetime dimensions. Solutions reveal standard signatures of a first order phase transition with a critical endpoint leading to a crossover regime, in qualitative agreement with lattice studies. The location of the critical endpoint, x ∼0 . 14 for SU(2) with a fundamental Higgs, is in rough but not tight quantitative agreement with the lattice. We end by commenting on the overall effectiveness and limitations of a 2PI (or in general n PI) effective action based study. In particular, we have been unable to find a 2PI gauge-fixing procedure which can simultaneously display the right phase structure and correctly handle the large-VEV Higgs region. We explain why doing so appears to be a serious challenge | 2PI resummation in 3D SU( N ) Higgs theory | 2pi resummation in 3d su( n ) higgs theory | utility formalism solving nonperturbative euclidean spacetime dimensions. reveal signatures endpoint crossover qualitative studies. endpoint rough tight lattice. commenting effectiveness limitations study. unable fixing simultaneously display correctly handle region. serious challenge | non_dup | [] |
25020663 | 10.1007/JHEP10(2014)107 | We consider ${\cal N}=4$ supersymmetric Yang Mills theory on a space with
supersymmetry preserving boundary conditions. The boundaries preserving half of
the 16 supercharges were analyzed and classified in an earlier work by Gaiotto
and Witten. We extend that analysis to the case with fewer supersymmetries,
concentrating mainly on the case preserving one quarter. We develop tools
necessary to explicitly construct boundary conditions which can be viewed as
taking the zero slope limit of a system of D3 branes intersecting and ending on
a collection of NS5 and D5 branes oriented to preserve the appropriate number
of supersymmetries. We analyze how these boundary conditions constrain the bulk
degrees of freedom and enumerate the unconstrained degrees of freedom from the
boundary/defect field theory point of view. The key ingredients used in the
analysis are a generalized version of Nahm's equations and the explicit
boundary/interface conditions for the NS5-like and D5-like impurities and
boundaries, which we construct and describe in detail. Some bulk degrees of
freedom suggested by the naive brane diagram considerations are lifted.Comment: 75 pages, 21 figure | Boundaries and Defects of N=4 SYM with 4 Supercharges, Part I:
Boundary/Junction Conditions | boundaries and defects of n=4 sym with 4 supercharges, part i: boundary/junction conditions | supersymmetric mills supersymmetry preserving conditions. boundaries preserving supercharges classified gaiotto witten. extend fewer supersymmetries concentrating preserving quarter. explicitly viewed branes intersecting ending branes oriented preserve supersymmetries. analyze constrain freedom enumerate unconstrained freedom defect view. ingredients nahm impurities boundaries detail. freedom naive brane considerations pages | non_dup | [] |
25036467 | 10.1007/JHEP10(2014)108 | We study the vacuum moduli spaces of 3d N=2 supersymmetric quantum field
theories by applying the formalism developed in our previous paper
arXiv:1404.5527. The 3d theories can be realized by branes in type IIB string
theory, which in a decoupling limit reduce to 4d N=4 super-Yang-Mills theory on
an interval with BPS defects inserted. The moduli space of a given 3d theory is
obtained by solving a generalization of Nahm's equations with appropriate
boundary/junction conditions, along with help from the S-duality of type IIB
string theory. Our classical computations reproduce many known results about
the quantum-corrected moduli spaces of 3d theories, e.g. U(N_c) theories with
N_f flavors with mass and FI parameters turned on. In particular, our methods
give first-principles derivations of several results in the literature,
including the s-rule, quantum splitting of classical Coulomb branches, the
lifting of the Coulomb branch by non-Abelian instantons, quantum merging of
Coulomb and Higgs branches, and phase transitions from re-ordering 5-branes.Comment: 83 pages, 27 figure | Boundaries and Defects of N=4 SYM with 4 Supercharges, Part II: Brane
Constructions and 3d N=2 Field Theories | boundaries and defects of n=4 sym with 4 supercharges, part ii: brane constructions and 3d n=2 field theories | moduli supersymmetric formalism realized branes decoupling super mills defects inserted. moduli solving generalization nahm junction duality theory. computations reproduce corrected moduli e.g. flavors turned principles derivations splitting coulomb branches lifting coulomb branch abelian instantons merging coulomb branches ordering pages | non_dup | [] |
25038187 | 10.1007/JHEP10(2014)113 | A light singlino in the NMSSM can reduce considerably the missing transverse
energy at the end of sparticle decay cascades; instead, light NMSSM-specific
Higgs bosons can be produced. Such scenarios can be consistent with present
constraints from the LHC with all sparticle masses below ~1 TeV. We discuss
search strategies, which do not rely on missing transverse energy, for such
scenarios at the next run of the LHC near 14 TeV.Comment: 20 pages, 9 Figures. References and experimental constraints added;
slight change of benchmark point, conclusions unchange | NMSSM with a singlino LSP: possible challenges for searches for
supersymmetry at the LHC | nmssm with a singlino lsp: possible challenges for searches for supersymmetry at the lhc | singlino nmssm considerably missing sparticle cascades nmssm bosons produced. scenarios sparticle tev. rely missing scenarios pages figures. slight benchmark unchange | non_dup | [] |
35084447 | 10.1007/JHEP10(2014)114 | Manifestly T-duality covariant worldsheet string models can be constructed by doubling the coordinate fields. We describe the underlying gauge symmetry of a recently proposed Lorentz invariant doubled worldsheet theory that makes half of the worldsheet degrees of freedom redundant. By shifting the Lagrange multiplier, that enforces the gauge fixing condition, the worldsheet action can be cast into various guises. We investigate the renormalization of this theory using a non-linear background/quantum split by employing a normal coordinate expansion adapted to the gauge-fixed theory. The propagator of the doubled coordinates contains a projection operator encoding that half of them do not propagate. We determine the doubled target space equations of motion by requiring one-loop Weyl invariance. Some of them are generalizations of the conventional sigma model beta-functions, while others seem to be novel to the doubled theory: in particular, a dilaton equation seems related to the strong constraint of double field theory. However, the other target space field equations are not identical to those of double field theory | Renormalization of a Lorentz invariant doubled worldsheet theory | renormalization of a lorentz invariant doubled worldsheet theory | manifestly duality covariant worldsheet doubling coordinate fields. lorentz doubled worldsheet worldsheet freedom redundant. shifting lagrange multiplier enforces fixing worldsheet cast guises. renormalization split employing coordinate adapted theory. propagator doubled projection encoding propagate. doubled requiring weyl invariance. generalizations sigma beta seem doubled dilaton theory. | non_dup | [] |
35084363 | 10.1007/JHEP10(2014)123 | We describe the first order moduli space of heterotic string theory compactifications which preserve N =1 supersymmetry in four dimensions, that is, the infinitesimal parameter space of the Strominger system. We establish that if we promote a connection on T X to a field, the moduli space corresponds to deformations of a holomorphic structure D ¯ $$ \overline{D} $$ on a bundle Q $$ \mathcal{Q} $$ . The bundle Q $$ \mathcal{Q} $$ is constructed as an extension by the cotangent bundle T ∗ X of the bundle E = End( V )⊕End( TX )⊕ TX with an extension class H $$ \mathcal{H} $$ which precisely enforces the anomaly cancelation condition. The deformations corresponding to the bundle E are simultaneous deformations of the holomorphic structures on the poly-stable bundles V and T X together with those of the complex structure of X . We discuss the fact that the “moduli” corresponding to End( T X ) cannot be physical, but are however needed in our mathematical structure to be able to enforce the anomaly cancelation condition. In the appendix we comment on the choice of connection on T X which has caused some confusion in the community before. It has been shown by Ivanov and others that this connection should also satisfy the instanton equations, and we give another proof of this fact | Holomorphic bundles and the moduli space of N=1 supersymmetric heterotic compactifications | holomorphic bundles and the moduli space of n=1 supersymmetric heterotic compactifications | moduli heterotic compactifications preserve supersymmetry infinitesimal strominger system. establish promote connection moduli deformations holomorphic overline bundle mathcal bundle mathcal cotangent bundle bundle ⊕end mathcal precisely enforces anomaly cancelation condition. deformations bundle simultaneous deformations holomorphic poly bundles “moduli” mathematical enforce anomaly cancelation condition. comment connection confusion before. ivanov connection satisfy instanton | non_dup | [] |
25038221 | 10.1007/JHEP10(2014)131 | We propose a modular anomaly equation for the prepotential of the N=2* super
Yang-Mills theory on R^4 with gauge group U(N) in the presence of an
Omega-background. We then study the behaviour of the prepotential in a large-N
limit, in which N goes to infinity with the gauge coupling constant kept fixed.
In this regime instantons are not suppressed. We focus on two representative
choices of gauge theory vacua, where the vacuum expectation values of the
scalar fields are distributed either homogeneously or according to the Wigner
semi-circle law. In both cases we derive an all-instanton exact formula for the
prepotential. As an application, we show that the gauge theory partition
function on S^4 at large N localises around a Wigner distribution for the
vacuum expectation values leading to a very simple expression in which the
instanton contribution becomes independent of the coupling constant.Comment: LaTeX, 32 pages, no figure | Modular anomaly equations in N=2* theories and their large-N limit | modular anomaly equations in n=2* theories and their large-n limit | propose modular anomaly prepotential super mills omega background. prepotential goes infinity kept fixed. instantons suppressed. choices vacua expectation homogeneously wigner circle law. derive instanton prepotential. partition localises wigner expectation instanton latex pages | non_dup | [] |
25022657 | 10.1007/JHEP10(2014)134 | We develop a systematic method to describe the moduli space of vacua of four
dimensional $\mathcal{N}=2$ class ${\cal S}$ theories including Coulomb branch,
Higgs branch and mixed branches. In particular, we determine the Higgs and
mixed branch roots, and the dimensions of the Coulomb and Higgs components of
mixed branches. They are derived by using generalized Hitchin's equations
obtained from twisted compactification of 5d maximal Super-Yang-Mills, with
local degrees of freedom at punctures given by (nilpotent) orbits. The crucial
thing is the holomorphic factorization of the Seiberg-Witten curve and
reduction of singularity at punctures. We illustrate our method by many
examples including ${\mathcal N}=2$ SQCD, $T_N$ theory and Argyres-Douglas
theories.Comment: 33 pages, 4 figure | The moduli space of vacua of N=2 class S theories | the moduli space of vacua of n=2 class s theories | moduli vacua mathcal coulomb branch branch branches. branch roots coulomb branches. hitchin twisted compactification maximal super mills freedom punctures nilpotent orbits. crucial thing holomorphic factorization seiberg witten singularity punctures. illustrate mathcal sqcd argyres douglas pages | non_dup | [] |
25013817 | 10.1007/JHEP10(2014)135 | The so-called Scattering Equations which govern the kinematics of the
scattering of massless particles in arbitrary dimensions have recently been
cast into a system of homogeneous polynomials. We study these as affine and
projective geometries which we call Scattering Varieties by analyzing such
properties as Hilbert series, Euler characteristic and singularities.
Interestingly, we find structures such as affine Calabi-Yau threefolds as well
as singular K3 and Fano varieties.Comment: 29 pages; v2: substantially improved presentation, results added
(Hodge diamond), references added, typos correcte | The Scattering Variety | the scattering variety | govern kinematics massless cast homogeneous polynomials. affine projective geometries call varieties analyzing hilbert euler singularities. interestingly affine calabi threefolds singular fano pages substantially presentation hodge diamond typos correcte | non_dup | [] |
25046582 | 10.1007/JHEP10(2014)137 | We study the evolution of cosmological perturbations generated during de
Sitter inflation in the singleton gravity theory. This theory is composed of a
dipole ghost pair in addition to tensor. We obtain the singleton power spectra
which show that the de Sitter/logarithmic conformal field theory (dS/LCFT)
correspondence works for computing the power spectra in the superhorizon limit.
Also we compute the spectral indices for light singleton which contains a
logarithmic correction.Comment: 1+18 pages, no figures, published versio | Cosmological singleton gravity theory and dS/LCFT correspondence | cosmological singleton gravity theory and ds/lcft correspondence | cosmological perturbations sitter inflation singleton theory. composed dipole ghost tensor. singleton sitter logarithmic conformal lcft correspondence superhorizon limit. indices singleton logarithmic pages versio | non_dup | [] |
35084367 | 10.1007/JHEP10(2014)138 | In this paper we revisit the problem of the solution to Balitsky-Kovchegov equation deeply in the saturation domain. We find that solution has the form given in ref. [23] but it depends on variable z ¯ = ln x 2 Q s 2 + Const $$ \overline{z}= \ln \left({x}^2{Q}_s^2\right)+\mathrm{Const} $$ and the value of Const is calculated in this paper. We propose the solution for full BFKL kernel at large z ¯ $$ \overline{z} $$ in the entire kinematic region that satisfies the McLerran-Venugopalan-type [3–7] initial condition | Non linear evolution: revisiting the solution in the saturation region | non linear evolution: revisiting the solution in the saturation region | revisit balitsky kovchegov deeply saturation domain. ref. const overline mathrm const const paper. propose bfkl kernel overline kinematic satisfies mclerran venugopalan | non_dup | [] |
25048176 | 10.1007/JHEP10(2014)139 | We present threshold enhanced N$^3$LO QCD corrections to inclusive Higgs
production through bottom anti-bottom annihilation at hadron colliders using
threshold resummed cross section. The resummed cross section is obtained using
factorization properties and Sudakov resummation of the inclusive cross
section. We use the recent results on threshold N$^3$LO corrections in QCD for
Drell-Yan production and three loop QCD corrections to Higgs form factor with
bottom anti-bottom quark to achieve this task. This is the first step towards
the evaluation of complete N$^3$LO result. We have numerically demonstrated the
importance of such corrections at the LHC.Comment: 15 pages, 1 figur | Higgs boson production through $b \bar b$ annihilation at threshold in
N$^3$LO QCD | higgs boson production through $b \bar b$ annihilation at threshold in n$^3$lo qcd | inclusive annihilation hadron colliders resummed section. resummed factorization sudakov resummation inclusive section. drell task. result. numerically pages figur | non_dup | [] |
35084351 | 10.1007/JHEP10(2014)144 | We study the phase structure of the scalar field theory on fuzzy ℂ P n in the large N limit. Considering the theory as a hermitian matrix model we compute the perturbative expansion of the kinetic term effective action under the assumption of distributions being close to the semicircle. We show that this model admits also a uniform order phase, corresponding to the asymmetric one-cut distribution, and we find the phase boundary. We compute a non-perturbative approximation to the effective action which enables us to identify the disorder and the non-uniform order phases and the phase transition between them. We locate the triple point of the theory and find an agreement with previous numerical studies for the case of the fuzzy sphere | Uniform order phase and phase diagram of scalar field theory on fuzzy ℂ P n | uniform order phase and phase diagram of scalar field theory on fuzzy ℂ p n | fuzzy limit. hermitian perturbative semicircle. admits asymmetric boundary. perturbative enables disorder them. locate triple fuzzy sphere | non_dup | [] |
35084346 | 10.1007/JHEP10(2014)153 | We study gauge fields of arbitrary spin in de Sitter space. These include Yang-Mills fields and gravitons, as well as the higher-spin fields of Vasiliev theory. We focus on antipodally symmetric solutions to the field equations, i.e. ones that live on “elliptic” de Sitter space d S 4 / ℤ 2 $$ d{S}_4/{\mathrm{\mathbb{Z}}}_2 $$ . For free fields, we find spanning sets of such solutions, including boundary-to-bulk propagators. We find that free solutions on d S 4 / ℤ 2 $$ d{S}_4/{\mathrm{\mathbb{Z}}}_2 $$ can only have one of the two types of boundary data at infinity, meaning that the boundary 2-point functions vanish. In Vasiliev theory, this property persists order by order in the interaction, i.e. the boundary n -point functions in d S 4 / ℤ 2 $$ d{S}_4/{\mathrm{\mathbb{Z}}}_2 $$ all vanish. This implies that a higher-spin dS/CFT based on the Lorentzian d S 4 / ℤ 2 $$ d{S}_4/{\mathrm{\mathbb{Z}}}_2 $$ action is empty. For more general interacting theories, such as ordinary gravity and Yang-Mills, we can use the free-field result to define a well-posed perturbative initial value problem in d S 4 / ℤ 2 $$ d{S}_4/{\mathrm{\mathbb{Z}}}_2 $$ | Antipodally symmetric gauge fields and higher-spin gravity in de Sitter space | antipodally symmetric gauge fields and higher-spin gravity in de sitter space | sitter space. mills gravitons vasiliev theory. antipodally i.e. live “elliptic” sitter mathrm mathbb spanning propagators. mathrm mathbb infinity meaning vanish. vasiliev persists i.e. mathrm mathbb vanish. lorentzian mathrm mathbb empty. interacting ordinary mills posed perturbative mathrm mathbb | non_dup | [] |
25054134 | 10.1007/JHEP10(2014)162 | 6d QFTs are constrained by the analog of 't Hooft anomaly matching: all
anomalies for global symmetries and metric backgrounds are constants of RG
flows, and for all vacua in moduli spaces. We discuss an anomaly matching
mechanism for 6d N=(1,0) theories on their Coulomb branch. It is a global
symmetry analog of Green-Schwarz-West-Sagnotti anomaly cancellation, and
requires the apparent anomaly mismatch to be a perfect square, $\Delta
I_8={1\over 2}X_4^2$. Then $\Delta I_8$ is cancelled by making $X_4$ an
electric / magnetic source for the tensor multiplet, so background gauge field
instantons yield charged strings. This requires the coefficients in $X_4$ to be
integrally quantized. We illustrate this for N=(2,0) theories. We also consider
the N=(1,0) SCFTs from N small $E_8$ instantons, verifying that the recent
result for its anomaly polynomial fits with the anomaly matching mechanism.Comment: 12 pages, no figure | 6d, N=(1,0) Coulomb Branch Anomaly Matching | 6d, n=(1,0) coulomb branch anomaly matching | qfts constrained analog hooft anomaly matching anomalies symmetries backgrounds flows vacua moduli spaces. anomaly matching coulomb branch. analog schwarz west sagnotti anomaly cancellation apparent anomaly mismatch perfect delta delta cancelled multiplet instantons strings. integrally quantized. illustrate theories. scfts instantons verifying anomaly fits anomaly matching pages | non_dup | [] |
35084122 | 10.1007/JHEP10(2014)165 | We present a measurement of the time-dependent CP violation parameters in B 0 → η ′ K 0 decays. The measurement is based on the full data sample containing 772 × 10 6 B B ¯ $$ B\overline{B} $$ pairs collected at the Υ(4 S ) resonance using the Belle detector at the KEKB asymmetric-energy e + e − collider. The measured values of the mixing-induced and direct CP violation parameters are: sin 2 ϕ 1 eff = + 0.68 ± 0.07 ± 0.03 , $$ \sin\ 2{\phi}_1^{\mathrm{eff}}=+0.68\pm 0.07\pm 0.03, $$ A η ′ K 0 = + 0.03 ± 0.05 ± 0.04 , $$ {\mathcal{A}}_{{{{}_{\eta}}_{\prime}}_{K^0}}=+0.03\pm 0.05\pm 0.04, $ | Measurement of time-dependent CP violation in B 0 → η ′ K 0 decays | measurement of time-dependent cp violation in b 0 → η ′ k 0 decays | violation decays. overline belle kekb asymmetric collider. violation mathrm mathcal prime | non_dup | [] |
25045761 | 10.1007/JHEP10(2014)169 | The correlator of two gluonic operators plays an important role for example
in transport properties of a Quark Gluon Plasma (QGP) or in sum rules for
glueballs.
In [1] an operator product expansion (OPE) at zero temperature was performed
for the correlators of two scalar operators $O_1=-\frac{1}{4} G^{\mu \nu}G_{\mu
\nu}$ and two QCD energy-momentum tensors $T^{\mu\nu}$. There we presented
analytical two-loop results for the Wilson coefficient $C_1$ in front of the
gluon condensate operator $O_1$. In this paper these results are extended to
three-loop order.
The three-loop Wilson coefficient $C_0$ in front of the unity operator
$O_0=1$ was already presented in [1] for the $T^{\mu\nu}$-correlator. For the
$O_1$-correlator the coefficient $C_0$ is known to four loop order from [2].
For the correlator of two pseudoscalar operators
$\tilde{O}_1=\varepsilon_{\mu\nu\rho\sigma} G^{\mu \nu} G^{\rho \sigma}$ both
coefficients $C_0$ and $C_1$ were computed in [3] to three-loop order. At zero
temperature $C_0$ and $C_1$ are the leading Wilson coefficients in massless
QCD.Comment: v2: typos fixed: sign error in (2.18) and (2.19) corrected; all
calculated results stay untouched; Note added about the origin of the contact
terms in the scalar gluonic correlato | OPE of the energy-momentum tensor correlator and the gluon condensate
operator in massless QCD to three-loop order | ope of the energy-momentum tensor correlator and the gluon condensate operator in massless qcd to three-loop order | correlator gluonic plays gluon glueballs. correlators frac tensors wilson front gluon condensate order. wilson front unity correlator. correlator correlator pseudoscalar tilde varepsilon sigma sigma order. wilson massless typos corrected stay untouched gluonic correlato | non_dup | [] |
35084295 | 10.1007/JHEP10(2014)173 | In high energy hadronic collisions, a general CP -violating Higgs boson Φ with accompanying jets can be efficiently produced via gluon fusion, which is mediated by heavy quark loops. In this article, we study the dominant sub-channel gg → ggg Φ of the gluon fusion production process with triple real emission corrections at order α s 5 . We go beyond the heavy top-quark approximation and include the full mass dependence of the top- and bottom-quark contributions. Furthermore, in a specific model we demonstrate the features of our program and show the impact of bottom-quark loop contributions in combination with large values of tan β on differential distributions sensitive to CP -measurements of the Higgs boson | Higgs boson CP -properties of the gluonic contributions in Higgs plus three jet production via gluon fusion at the LHC | higgs boson cp -properties of the gluonic contributions in higgs plus three jet production via gluon fusion at the lhc | hadronic collisions violating boson accompanying jets efficiently gluon fusion loops. gluon fusion triple contributions. boson | non_dup | [] |
35084294 | 10.1007/JHEP10(2014)174 | Several recent papers argue against firewalls by relaxing the requirement for locality outside the stretched horizon. In the firewall argument, locality essentially serves the purpose of ensuring that the degrees of freedom required for infall are those in the proximity of the black hole and not the ones in the early radiation. We make the firewall argument sharper by utilizing the AdS/CFT framework and claim that the firewall argument essentially states that the dual to a thermal state in the CFT is a firewall | Firewalls in AdS/CFT | firewalls in ads/cft | papers argue firewalls relaxing requirement locality stretched horizon. firewall argument locality essentially serves ensuring freedom infall proximity radiation. firewall argument sharper utilizing claim firewall argument essentially firewall | non_dup | [] |
29530099 | 10.1007/JHEP10(2015)001 | We construct the minimal effective field theory (EFT) of supersymmetric
inflation, whose field content is a real scalar, the goldstone for
time-translation breaking, and a Weyl fermion, the goldstino for supersymmetry
(SUSY) breaking. The inflating background can be viewed as a single
SUSY-breaking sector, and the degrees of freedom can be efficiently
parameterized using constrained superfields. Our EFT is comprised of a chiral
superfield X_NL containing the goldstino and satisfying X_NL^2 = 0, and a real
superfield B_NL containing both the goldstino and the goldstone, satisfying
X_NL B_NL = B_NL^3 = 0. We match results from our EFT formalism to existing
results for SUSY broken by a fluid background, showing that the goldstino
propagates with subluminal velocities. The same effect can also be derived from
the unitary gauge gravitino action after embedding our EFT in supergravity. If
the gravitino mass is comparable to the Hubble scale during inflation, we
identify a new parameter in the EFT related to a time-dependent phase of the
gravitino mass parameter. We briefly comment on the leading contributions of
goldstino loops to inflationary observables.Comment: 32 pages, 2 figures. v3: clarifications and references added. Matches
JHEP version. v2: typos fixed, footnote and references adde | The goldstone and goldstino of supersymmetric inflation | the goldstone and goldstino of supersymmetric inflation | supersymmetric inflation goldstone translation breaking weyl fermion goldstino supersymmetry susy breaking. inflating viewed susy breaking freedom efficiently parameterized constrained superfields. comprised chiral superfield goldstino satisfying superfield goldstino goldstone satisfying match formalism susy broken goldstino propagates subluminal velocities. unitary gravitino embedding supergravity. gravitino comparable hubble inflation gravitino parameter. briefly comment goldstino loops inflationary pages figures. clarifications added. matches jhep version. typos footnote adde | non_dup | [] |
29552557 | 10.1007/JHEP10(2015)004 | We find a new $\mathcal{N}=2$ $AdS_4$ solution in M-theory supported by
purely magnetic flux via a sequence of abelian and non-abelian T-dualities.
This provides the second known example in this class besides the uplift of the
Pernici and Sezgin solution to 7d gauged supergravity constructed in the
eighties. We compute the free energy of the solution, and show that it scales
as $N^{3/2}$. It is intriguing that even though the natural holographic
interpretation is in terms of M5-branes wrapped on a special Lagrangian
3-cycle, this solution does not exhibit the expected $N^3$ behavior.Comment: 19 pages plus appendices. v2 metadata amended, reference adde | A $\mathcal{N}=2$ Supersymmetric $AdS_4$ Solution in M-theory with
Purely Magnetic Flux | a $\mathcal{n}=2$ supersymmetric $ads_4$ solution in m-theory with purely magnetic flux | mathcal purely abelian abelian dualities. besides uplift pernici sezgin gauged supergravity eighties. intriguing holographic branes wrapped lagrangian exhibit pages appendices. metadata amended adde | non_dup | [] |
29554244 | 10.1007/JHEP10(2015)016 | The extremal Reissner-Nordstrom black hole embedded in a Melvin-like magnetic
universe is studied in the framework of the Kerr/CFT correspondence. The near
horizon geometry can be written as a warped and twisted product of $AdS_2
\times S^2$, also in presence of an axial external magnetic field that deforms
the black hole. The central charge of the Virasoro algebra can be extracted
from the asymptotic symmetries. Using the Cardy formula for the microscopic
statistical entropy of the dual two-dimensional CFT, the Bekenstein-Hawking
entropy, for this charged and magnetised black hole, is reproduced.Comment: 12 pages, accepted for publication in JHE | Microscopic Entropy of the Magnetised Extremal Reissner-Nordstrom Black
Hole | microscopic entropy of the magnetised extremal reissner-nordstrom black hole | extremal reissner nordstrom embedded melvin universe kerr correspondence. horizon warped twisted axial deforms hole. virasoro asymptotic symmetries. cardy microscopic bekenstein hawking magnetised pages publication | non_dup | [] |
29501307 | 10.1007/JHEP10(2015)019 | We consider the group manifold approach to higher spin theory. The deformed
local higher spin transformation is realized as the diffeomorphism
transformation in the group manifold $\textbf{M}$. With the suitable rheonomy
condition and the torsion constraint imposed, the unfolded equation can be
obtained from the Bianchi identity, by solving which, fields in $\textbf{M}$
are determined by the multiplet at one point, or equivalently, by
$(W^{[a(s-1),b(0)]}_{\mu},H)$ in $AdS_{4}\subset \textbf{M}$. Although the
space is extended to $\textbf{M}$ to get the geometrical formulation, the
dynamical degrees of freedom are still in $AdS_{4}$. The $4d$ equations of
motion for $(W^{[a(s-1),b(0)]}_{\mu},H)$ are obtained by plugging the rheonomy
condition into the Bianchi identity. The proper rheonomy condition allowing for
the maximum on-shell degrees of freedom is given by Vasiliev equation. We also
discuss the theory with the global higher spin symmetry, which is in parallel
with the WZ model in supersymmetry.Comment: 35 pages,v2: revised version, v3: 38 pages, improved discussion on
global HS symmetry, clarifications added in appendix B, journal versio | Group manifold approach to higher spin theory | group manifold approach to higher spin theory | manifold theory. deformed realized diffeomorphism manifold textbf rheonomy torsion imposed unfolded bianchi solving textbf multiplet equivalently textbf textbf geometrical formulation freedom plugging rheonomy bianchi identity. proper rheonomy allowing freedom vasiliev equation. pages revised pages clarifications versio | non_dup | [] |
29556353 | 10.1007/JHEP10(2015)021 | BPS instantons are discussed in Lifshitz-type anisotropic field theories. We
consider generalizations of the sigma model/Yang-Mills instantons in
renormalizable higher dimensional models with the classical Lifshitz scaling
invariance. In each model, BPS instanton equation takes the form of the
gradient flow equations for "the superpotential" defining "the detailed balance
condition". The anisotropic Weyl rescaling and the coset space dimensional
reduction are used to map rotationally symmetric instantons to vortices in
two-dimensional anisotropic systems on the hyperbolic plane. As examples, we
study anisotropic BPS baby Skyrmion 1+1 dimensions and BPS Skyrmion in 2+1
dimensions, for which we take Kahler 1-form and the Wess-Zumiono-Witten term as
the superpotentials, respectively, and an anisotropic generalized Yang-Mills
instanton in 4+1 dimensions, for which we take the Chern-Simons term as the
superpotential.Comment: 32 pages, 5 figure | Instantons in Lifshitz Field Theories | instantons in lifshitz field theories | instantons lifshitz anisotropic theories. generalizations sigma mills instantons renormalizable lifshitz invariance. instanton superpotential defining balance anisotropic weyl rescaling coset rotationally instantons vortices anisotropic hyperbolic plane. anisotropic baby skyrmion skyrmion kahler wess zumiono witten superpotentials anisotropic mills instanton chern simons pages | non_dup | [] |
29544164 | 10.1007/JHEP10(2015)027 | We study renormalizable extensions of the standard model that contain
vector-like fermions in a (single) complex representation of the standard model
gauge group. There are 11 models where the vector-like fermions Yukawa couple
to the standard model fermions via the Higgs field. These models do not
introduce additional fine- tunings. They can lead to, and are constrained by, a
number of different flavor- changing processes involving leptons and quarks, as
well as direct searches. An interesting feature of the models with strongly
interacting vector-like fermions is that constraints from neutral meson mixings
(apart from CP violation in neutral kaon mixing) are not sensitive to higher
scales than other flavor-changing neutral-current processes. We identify order
1/(4 pi M)^2 (where M is the vector-like fermion mass) one-loop contributions
to the coefficients of the four-quark operators for meson mixing, that are not
suppressed by standard model quark masses and/or mixing angles.Comment: 25 pages, 3 figures, several issues are added, accepted in JHE | New Vector-Like Fermions and Flavor Physics | new vector-like fermions and flavor physics | renormalizable extensions fermions group. fermions yukawa couple fermions field. fine tunings. constrained flavor changing involving leptons quarks searches. interacting fermions neutral meson mixings apart violation neutral kaon flavor changing neutral processes. fermion meson suppressed pages | non_dup | [] |
29528501 | 10.1007/JHEP10(2015)039 | We derive and solve the difference equations on the toric modular kernel
following from the consistency relations in the fusion algebra. The result is
explicit and simple series expansion for the toric modular kernel of
non-degenerate Virasoro conformal blocks. We show that this expansion is
equivalent to the celebrated integral representation due to B. Ponsot and J.
Teschner. We also interpret obtained series representation as a
non-perturbative expansion and note that this raises further questions.Comment: 19+7 pages; v2: minor revisio | On modular transformations of non-degenerate toric conformal blocks | on modular transformations of non-degenerate toric conformal blocks | derive solve toric modular kernel consistency fusion algebra. toric modular kernel degenerate virasoro conformal blocks. celebrated ponsot teschner. interpret perturbative raises pages minor revisio | non_dup | [] |
39331830 | 10.1007/JHEP10(2015)042 | Flavor symmetric model is one of the attractive Beyond Standard Models (BSMs) to reveal the flavor structure of the Standard Model (SM). A lot of efforts have been put into the model building and we find many kinds of flavor symmetries and setups are able to explain the observed fermion mass matrices. In this paper, we look for common predictions of physical observables among the ones in flavor symmetric models, and try to understand how to test flavor symmetry in experiments. Especially, we focus on the BSMs for leptons with extra Higgs SU(2)Ldoublets charged under flavor symmetry. In many flavor models for leptons, remnant symmetry is partially respected after the flavor symmetry breaking, and it controls well the Flavor Changing Neutral Currents (FCNCs) and suggests some crucial predictions against the flavor changing process, although the remnant symmetry is not respected in the full lagrangian. In fact, we see that τ[−]→ e[+]μ[−]μ[−](μ[+]e[−]e[−]) and e[+]e[−]→ τ[+]τ[−](μ[−]μ[+]) processes are the most important in the flavor models that the extra Higgs doublets belong to triplet representation of flavor symmetry. For instance, the stringent constraint from the μ → eγ process could be evaded according to the partial remnant symmetry. We also investigate the breaking effect of the remnant symmetry mediated by the Higgs scalars, and investigate the constraints from the flavor physics: the flavor violating τ and μ decays, the electric dipole moments, and the muon anomalous magnetic moment. We also discuss the correlation between FCNCs and nonzero θ[13], and point out the physical observables in the charged lepton sector to test the BSMs for the neutrino mixing | Study of lepton flavor violation in flavor symmetric models for lepton sector | study of lepton flavor violation in flavor symmetric models for lepton sector | flavor attractive bsms reveal flavor efforts kinds flavor symmetries setups fermion matrices. look observables flavor flavor experiments. bsms leptons extra ldoublets flavor symmetry. flavor leptons remnant partially respected flavor breaking flavor changing neutral currents fcncs crucial flavor changing remnant respected lagrangian. flavor extra doublets belong triplet flavor symmetry. stringent evaded remnant symmetry. breaking remnant scalars flavor flavor violating decays dipole moments muon anomalous moment. fcncs nonzero observables lepton bsms | non_dup | [] |
29534797 | 10.1007/JHEP10(2015)047 | In this paper, we study the holographic s+p model in 5-dimensional bulk
gravity with the Gauss-Bonnet term. We work in the probe limit and give the
$\Delta$-T phase diagrams at three different values of the Gauss-Bonnet
coefficient to show the effect of the Gauss-Bonnet term. We also construct the
P-T phase diagrams for the holographic system using two different definitions
of the pressure and compare the results.Comment: 17 pages, 5 figures, we have added new P-T phase diagrams with the
pressure defined in boundary stress-energy tenso | P-T phase diagram of a holographic s+p model from Gauss-Bonnet gravity | p-t phase diagram of a holographic s+p model from gauss-bonnet gravity | holographic gauss bonnet term. delta diagrams gauss bonnet gauss bonnet term. diagrams holographic definitions pages diagrams tenso | non_dup | [] |
29547436 | 10.1007/JHEP10(2015)050 | We study the effective physics of F-theory at order $\alpha'^3$ in derivative
expansion. We show that the ten-dimensional type IIB eight-derivative couplings
involving the graviton and the axio-dilaton naturally descend from pure gravity
in twelve dimensions. Upon compactification on elliptically fibered Calabi-Yau
fourfolds, the non-trivial vacuum profile for the axio-dilaton leads to a new,
genuinely N=1, $\alpha'^3$ correction to the four-dimensional effective action.Comment: 24 pages, minor improvements, typos correcte | F-theory at order $\alpha'^3$ | f-theory at order $\alpha'^3$ | alpha expansion. eight couplings involving graviton axio dilaton naturally descend twelve dimensions. compactification elliptically fibered calabi fourfolds trivial axio dilaton genuinely alpha pages minor improvements typos correcte | non_dup | [] |
29521799 | 10.1007/JHEP10(2015)052 | A new method of including the complete NLO QCD corrections to hard processes
in the LO parton-shower Monte Carlo (PSMC) is presented. This method, called
KrkNLO, requires the use of parton distribution functions in a dedicated Monte
Carlo factorization scheme, which is also discussed in this paper. In the
future, it may simplify introduction of the NNLO corrections to hard processes
and the NLO corrections to PSMC. Details of the method and numerical examples
of its practical implementation, as well as comparisons with other
calculations, such as MCFM, MC@NLO, POWHEG, for single $Z/\gamma^*$-boson
production at the LHC, are presented.Comment: 50 pages, 14 figures. Version published in JHEP: added a comparison
of krkNLO results and the fixed-order NNLO result from the DYNNLO program and
addressed several points raised by the refere | Matching NLO QCD with parton shower in Monte Carlo scheme - the KrkNLO
method | matching nlo qcd with parton shower in monte carlo scheme - the krknlo method | parton shower monte carlo psmc presented. krknlo parton dedicated monte carlo factorization paper. simplify nnlo psmc. practical comparisons mcfm powheg gamma boson pages figures. jhep krknlo nnlo dynnlo addressed raised refere | non_dup | [] |
29553551 | 10.1007/JHEP10(2015)059 | Recent works have related the bulk first law of black hole mechanics to the
first law of entanglement in a dual CFT. These are first order relations, and
receive corrections for finite changes. In particular, the latter is naively
expected to be accurate only for small changes in the quantum state. But when
Newton's constant is small relative to the AdS scale, the former holds to good
approximation even for classical perturbations that contain many quanta. This
suggests that -- for appropriate states -- corrections to the first law of
entanglement are suppressed by powers of $N$ in CFTs whose correlators satisfy
't Hooft large-$N$ power counting. We take first steps toward verifying that
this is so by studying the large-$N$ structure of the entropy of spatial
regions for a class of CFT states motivated by those created from the vacuum by
acting with real-time single-trace sources. We show that $1/N$ counting matches
bulk predictions, though we require the effect of the source on the modular
hamiltonian to be non-singular. The magnitude of our sources is $\epsilon N$
with $\epsilon$ fixed-but-small as $N\rightarrow \infty$. Our results also
provide a perturbative derivation -- without relying on the replica trick -- of
the subleading Faulkner-Lewkowycz-Maldacena correction to the Ryu-Takayagi and
Hubeny-Rangamani-Takayanagi conjectures at all orders in $1/N$.Comment: 24 pages, no figures. v2: minor changes to agree with published
versio | 't Hooft suppression and holographic entropy | 't hooft suppression and holographic entropy | mechanics entanglement cft. receive changes. naively state. newton former perturbations quanta. entanglement suppressed powers cfts correlators satisfy hooft counting. toward verifying studying motivated created acting trace sources. counting matches modular singular. epsilon epsilon rightarrow infty perturbative derivation relying replica trick subleading faulkner lewkowycz maldacena takayagi hubeny rangamani takayanagi conjectures orders .comment pages figures. minor agree versio | non_dup | [] |
77019549 | 10.1007/JHEP10(2015)060 | We find an exact type IIB supergravity solution that represents a one-parameter deformation of the T-dual of the AdS5 × S5 background (with T-duality applied in all 6 abelian bosonic isometric directions). The non-trivial fields are the metric, dilaton and RR 5-form only. The latter has remarkably simple “undeformed” form when written in terms of a “deformation-rotated” vielbein basis. An unusual feature of this solution is that the dilaton contains a linear dependence on the isometric coordinates of the metric precluding a straightforward reversal of T-duality. If we still formally dualize back, we find exactly the metric, B-field and product of dilaton with RR field strengths as recently extracted from the η-deformed AdS5 × S5 superstring action in arXiv:1507.04239. We also discuss similar solutions for deformed AdSn × Sn backgrounds with n = 2, 3. In the η → i limit we demonstrate that all these backgrounds can be interpreted as special limits of gauged WZW models and are also related to (a limit of) the Pohlmeyer-reduced models of the AdSn × Sn superstrings | Type IIB supergravity solution for the T-dual of the eta-deformed AdS(5) x S-5 superstring | type iib supergravity solution for the t-dual of the eta-deformed ads(5) x s-5 superstring | supergravity deformation duality abelian bosonic isometric directions trivial dilaton only. remarkably “undeformed” “deformation rotated” vielbein basis. unusual dilaton isometric precluding straightforward reversal duality. formally dualize dilaton strengths deformed superstring deformed adsn backgrounds backgrounds interpreted gauged pohlmeyer adsn superstrings | non_dup | [] |
161409191 | 10.1007/JHEP10(2015)063 | We classify the quantum numbers of the extra U(1)' symmetries contained in\ud
E_6 . In particular, we categorize the cases with rational charges and present the full list of\ud
models which arise from the chains of the maximal subgroups of E_6 . As an application,\ud
the classification allows us to determine all embeddings of the Standard Model fermions\ud
in all possible decompositions of the fundamental representation of E_6 under its maximal\ud
subgroups. From this we find alternative chains of subgroups for Grand Unified Theories.\ud
We show how many of the known models including some new ones appear in alternative\ud
breaking patterns. We also use low energy constraints coming from parity-violating asymmetry measurements and atomic parity non-conservation to set limits on the E 6 motivated\ud
parameter space for a Z' boson mass of 1.2 TeV. We include projected limits for the present\ud
and upcoming QWEAK, MOLLER and SOLID experiments | Alternative Z ′ bosons in E 6 | alternative z ′ bosons in e 6 | classify extra symmetries categorize rational charges arise chains maximal subgroups embeddings fermions decompositions maximal subgroups. chains subgroups grand unified theories. breaking patterns. coming parity violating asymmetry parity conservation motivated boson tev. projected upcoming qweak moller | non_dup | [] |
29528196 | 10.1007/JHEP10(2015)065 | We discuss connections between certain classes of supersymmetric quiver gauge
theories and integrable lattice models from the point of view of topological
quantum field theories (TQFTs). The relevant classes include 4d $\mathcal{N} =
1$ theories known as brane box and brane tilling models, 3d $\mathcal{N} = 2$
and 2d $\mathcal{N} = (2,2)$ theories obtained from them by compactification,
and 2d $\mathcal{N} = (0,2)$ theories closely related to these theories. We
argue that their supersymmetric indices carry structures of TQFTs equipped with
line operators, and as a consequence, are equal to the partition functions of
lattice models. The integrability of these models follows from the existence of
extra dimension in the TQFTs, which emerges after the theories are embedded in
M-theory. The Yang-Baxter equation expresses the invariance of supersymmetric
indices under Seiberg duality and its lower-dimensional analogs.Comment: 46 pages. v2: minor changes and corrections; v3: minor changes and
corrections, references added, published version; v4: typos corrected, a
reference correcte | Quiver gauge theories and integrable lattice models | quiver gauge theories and integrable lattice models | connections supersymmetric quiver integrable topological tqfts mathcal brane brane tilling mathcal mathcal compactification mathcal closely theories. argue supersymmetric indices carry tqfts equipped partition models. integrability extra tqfts emerges embedded theory. baxter expresses invariance supersymmetric indices seiberg duality pages. minor minor typos corrected correcte | non_dup | [] |
75988790 | 10.1007/JHEP10(2015)067 | We revisit the production of leptonic asymmetries in minimal extensions of the Standard Model that can explain neutrino masses, involving extra singlets with Majorana masses in the GeV scale. We study the quantum kinetic equations both analytically, via a perturbative expansion up to third order in the mixing angles, and numerically. The analytical solution allows us to identify the relevant CP invariants, and simplifies the exploration of the parameter space. We find that sizeable lepton asymmetries are compatible with non-degenerate neutrino masses and measurable active-sterile mixings | Leptogenesis in GeV-scale seesaw models | leptogenesis in gev-scale seesaw models | revisit leptonic asymmetries extensions involving extra singlets majorana scale. analytically perturbative angles numerically. invariants simplifies exploration space. sizeable lepton asymmetries compatible degenerate measurable sterile mixings | non_dup | [] |
29555417 | 10.1007/JHEP10(2015)068 | We consider the linear stability of $4$-dimensional hairy black holes with
mixed boundary conditions in Anti-de Sitter spacetime. We focus on the mass of
scalar fields around the maximally supersymmetric vacuum of the gauged
$\mathcal{N}=8$ supergravity in four dimensions, $m^{2}=-2l^{-2}$. It is shown
that the Schr\"{o}dinger operator on the half-line, governing the $S^{2}$,
$H^{2}$ or $\mathbb{R}^{2}$ invariant mode around the hairy black hole, allows
for non-trivial self-adjoint extensions and each of them correspons to a class
of mixed boundary conditions in the gravitational theory. Discarding the
self-adjoint extensions with a negative mode impose a restriction on these
boundary conditions. The restriction is given in terms of an integral of the
potential in the Schr\"{o}dinger operator resembling the estimate of Simon for
Schr\"{o}dinger operators on the real line. In the context of AdS/CFT duality,
our result has a natural interpretation in terms of the field theory dual
effective potential.Comment: 13 pages, no figures, references added, matches published versio | Hairy Black Hole Stability in AdS, Quantum Mechanics on the Half-Line
and Holography | hairy black hole stability in ads, quantum mechanics on the half-line and holography | hairy holes sitter spacetime. maximally supersymmetric gauged mathcal supergravity schr dinger governing mathbb hairy trivial adjoint extensions correspons gravitational theory. discarding adjoint extensions impose restriction conditions. restriction schr dinger resembling simon schr dinger line. duality pages matches versio | non_dup | [] |
79094477 | 10.1007/JHEP10(2015)072 | Published: October 12, 2015Two potential sources of tuning exist in composite Higgs models: one comes from keeping the Higgs VEV below the compositeness scale and one comes from keeping the Higgs light after constraints on the top partner masses are applied. We construct a measure that determines whether these tunings are independent or not and combines them appropriately. We perform a comprehensive scan of the parameter space for three explicit models and report the minimum tuning values compatible with existing collider constraints. Tuning values are given as functions of resonance masses and deviations to the Higgs couplings so the effect of future constraints can easily be quantified. The current minimum tuning in the minimal model is 2.5-5% and will be decreased to around 0.8-3.3% if no top partners are observed over the lifetime of the LHCJames Barnard and Martin Whit | Collider constraints on tuning in composite Higgs models | collider constraints on tuning in composite higgs models | october tuning composite comes keeping compositeness comes keeping partner applied. determines tunings combines appropriately. comprehensive scan tuning compatible collider constraints. tuning deviations couplings quantified. tuning partners lifetime lhcjames barnard martin whit | non_dup | [] |
29553437 | 10.1007/JHEP10(2015)073 | Let ${\mathcal B}^{\, p, \, p^{\prime}, \, {\mathcal H}}_{N, n}$ be a
conformal block, with $n$ consecutive channels $\chi_{\i}$, $\i = 1, \cdots,
n$, in the conformal field theory $\mathcal{M}^{\, p, \, p^{\prime}}_N \!
\times \! \mathcal{M}^{\mathcal{H}}$, where $\mathcal{M}^{\, p, \,
p^{\prime}}_N$ is a $\mathcal{W}_N$ minimal model, generated by chiral fields
of spin $1, \cdots, N$, and labeled by two co-prime integers $p$ and
$p^{\prime}$, $1 < p < p^{\prime}$, while $\mathcal{M}^{\mathcal{H}}$ is a free
boson conformal field theory. $\mathcal{B}^{\, p, \, p^{\prime},
\mathcal{H}}_{N, n}$ is the expectation value of vertex operators between an
initial and a final state. Each vertex operator is labelled by a charge vector
that lives in the weight lattice of the Lie algebra $A_{N-1}$, spanned by
weight vectors $\omega_1, \cdots, \omega_{N-1}$. We restrict our attention to
conformal blocks with vertex operators whose charge vectors point along
$\omega_1$. The charge vectors that label the initial and final states can
point in any direction.
Following the $\mathcal{W}_N$ AGT correspondence, and using Nekrasov's
instanton partition functions without modification, to compute $\mathcal{B}^{\,
p, \, p^{\prime}, \mathcal{H}}_{N, n}$, leads to ill-defined expressions. We
show that restricting the states that flow in the channels $\chi_{\i}$, $\i =
1, \cdots, n$, to states labeled by $N$ partitions that satisfy conditions that
we call $N$-Burge partitions, leads to well-defined expressions that we
identify with $\mathcal{B}^{\, p, \, p^{\prime}, \, \mathcal{H}}_{N, n}$. We
check our identification by showing that a specific non-trivial conformal block
that we compute, using the $N$-Burge conditions satisfies the expected
differential equation.Comment: 34 pages. More references, same conten | AGT, N-Burge partitions and W_N minimal models | agt, n-burge partitions and w_n minimal models | mathcal prime mathcal conformal consecutive cdots conformal mathcal prime mathcal mathcal mathcal prime mathcal chiral cdots labeled prime integers prime prime mathcal mathcal boson conformal theory. mathcal prime mathcal expectation state. labelled lives spanned omega cdots omega restrict conformal blocks omega label direction. mathcal correspondence nekrasov instanton partition modification mathcal prime mathcal expressions. restricting cdots labeled partitions satisfy call burge partitions expressions mathcal prime mathcal check trivial conformal burge satisfies pages. conten | non_dup | [] |
34084292 | 10.1007/JHEP10(2015)074 | Signal-background interference effects are studied for H → W W and H → ZZ searches in gluon fusion at the LHC. More specifically, the interference in the channels with semileptonic weak boson pair decay is analysed for light and heavy Higgs masses with minimal and realistic experimental selection cuts. In the semileptonic decay modes, the interference is affected by tree-level background contributions enhanced by 1/e2 relative to the gluon-fusion continuum background in the fully leptonic decay modes. We find that for both light and heavy Higgs masses the interference with the loop-induced weak-boson pair background dominates over the interference with the tree-level weak-boson plus jets background for a range of selection cuts. We therefore conclude that higher-order background contributions can induce leading interference effects. With appropriate background suppression cuts the interference can be reduced to the 10% level for heavy Higgs masses, and to the per mille level for the light SM Higgs. © 2015, The Author(s) | Interference effects for H → WW → ℓνqq–′ and H → ZZ → ℓℓqq searches in gluon fusion at the LHC | interference effects for h → ww → ℓνqq–′ and h → zz → ℓℓqq searches in gluon fusion at the lhc | interference searches gluon fusion lhc. interference semileptonic boson analysed realistic cuts. semileptonic interference gluon fusion continuum leptonic modes. interference boson dominates interference boson jets cuts. induce interference effects. suppression cuts interference mille higgs. | non_dup | [] |
29563834 | 10.1007/JHEP10(2015)079 | Important insights into the dynamics of spherically symmetric AdS-scalar
field perturbations can be obtained by considering a simplified time-averaged
theory accurately describing perturbations of amplitude epsilon on time-scales
of order 1/epsilon^2. The coefficients of the time-averaged equations are
complicated expressions in terms of the AdS scalar field mode functions, which
are in turn related to the Jacobi polynomials. We analyze the behavior of these
coefficients for high frequency modes. The resulting asymptotics can be useful
for understanding the properties of the finite-time singularity in solutions of
the time-averaged theory recently reported in the literature. We highlight, in
particular, the gauge dependence of this asymptotics, with respect to the two
most commonly used gauges. The harsher growth of the coefficients at large
frequencies in higher-dimensional AdS suggests strengthening of turbulent
instabilities in higher dimensions. In the course of our derivations, we arrive
at recursive relations for the coefficients of the time-averaged theory that
are likely to be useful for evaluating them more efficiently in numerical
simulations.Comment: 15 pages; v4: typos in equation (33) correcte | Ultraviolet asymptotics and singular dynamics of AdS perturbations | ultraviolet asymptotics and singular dynamics of ads perturbations | insights spherically perturbations simplified averaged accurately describing perturbations epsilon epsilon averaged complicated expressions jacobi polynomials. analyze modes. asymptotics singularity averaged literature. highlight asymptotics commonly gauges. harsher strengthening turbulent instabilities dimensions. derivations arrive recursive averaged evaluating efficiently pages typos correcte | non_dup | [] |
29564365 | 10.1007/JHEP10(2015)080 | Spherically symmetric perturbations in AdS-scalar field systems of small
amplitude epsilon approximately periodic on time scales of order 1/epsilon^2
(in the sense that no significant transfer of energy between the AdS normal
modes occurs) have played an important role in considerations of AdS stability.
They are seen as anchors of stability islands where collapse of small
perturbations to black holes does not occur. (This collapse, if it happens,
typically develops on time scales of the order 1/epsilon^2.) We construct an
analytic treatment of the frequency spectra of such quasiperiodic
perturbations, paying special attention to the large frequency asymptotics. For
the case of a self-interacting phi^4 scalar field in a non-dynamical AdS
background, we arrive at a fairly complete analytic picture involving
quasiperiodic spectra with an exponential suppression modulated by a power law
at large mode numbers. For the case of dynamical gravity, the structure of the
large frequency asymptotics is more complicated. We give analytic explanations
for the general qualitative features of quasiperiodic solutions localized
around a single mode, in close parallel to our discussion of the probe scalar
field, and find numerical evidence for logarithmic modulations in the
gravitational quasiperiodic spectra existing on top of the formulas previously
reported in the literature.Comment: 18 pages; v3: minor improvements, published versio | Ultraviolet asymptotics for quasiperiodic AdS_4 perturbations | ultraviolet asymptotics for quasiperiodic ads_4 perturbations | spherically perturbations epsilon epsilon played considerations stability. anchors islands collapse perturbations holes occur. collapse happens develops epsilon analytic quasiperiodic perturbations paying asymptotics. interacting arrive fairly analytic picture involving quasiperiodic exponential suppression modulated numbers. asymptotics complicated. analytic explanations qualitative quasiperiodic localized logarithmic modulations gravitational quasiperiodic formulas pages minor improvements versio | non_dup | [] |
29548886 | 10.1007/JHEP10(2015)086 | We study bino-wino coannihilation scenario in the so-called spread or
mini-split supersymmetry. We show that, in this model, a neutral wino has a
macroscopic decay length in a wide range of parameter space. This
characteristic feature could be observed as a displaced vertex plus missing
transverse energy event at the LHC. In this paper, we study the current
constraints and future prospects on the scenario based on the displaced vertex
search performed by the ATLAS collaboration. It is found that a sizable
parameter region can be probed at the 8 TeV LHC run. This search strategy will
considerably extend its reach at the next stage of the LHC running, and thus
play a crucial role to examine a possibility of bino dark matter in the
mini-split type supersymmetric models.Comment: 21 pages, 7 figures; version accepted for publication in JHE | Probing Bino-Wino Coannihilation at the LHC | probing bino-wino coannihilation at the lhc | bino wino coannihilation spread mini split supersymmetry. neutral wino macroscopic space. displaced missing lhc. prospects displaced atlas collaboration. sizable probed run. considerably extend running crucial examine bino mini split supersymmetric pages publication | non_dup | [] |
29509400 | 10.1007/JHEP10(2015)090 | The conventional approximate formula for neutrino oscillation in matter which
is obtained from the expansion in terms of the ratio of mass square differences
$\alpha=\Delta m_{21}^{2}/\Delta m_{31}^{2}\approx0.03$, first proposed by
Cervera, et al and Freund, turns out to be an accurate formula for accelerator
neutrino experiments. Originally it required the neutrino energy to be well
above the solar resonance to validate the expansion but it is found to be still
very accurate when the formula is extrapolated to the resonance, which is
practically important for the T2K experiment. This paper shows that the
accuracy is guaranteed by cancellations of branch cut singularities and also,
for the first time, analytically computes the actual error of the formula. The
actual error implies that the original requirement can be safely removed in
current experiments.Comment: 22 pages,7 figures. Some materials are removed for simplicity.
Accepted by JHE | Why Is The Neutrino Oscillation Formula Expanded In $\Delta
m_{21}^{2}/\Delta m_{31}^{2}$ Still Accurate Near The Solar Resonance In
Matter? | why is the neutrino oscillation formula expanded in $\delta m_{21}^{2}/\delta m_{31}^{2}$ still accurate near the solar resonance in matter? | approximate oscillation alpha delta delta approx cervera freund turns accelerator experiments. originally validate extrapolated practically experiment. guaranteed cancellations branch singularities analytically computes formula. requirement safely removed pages figures. removed simplicity. | non_dup | [] |
29547861 | 10.1007/JHEP10(2015)093 | We construct the classical phase space of geometries in the near-horizon
region of vacuum extremal black holes as announced in [arXiv:1503.07861].
Motivated by the uniqueness theorems for such solutions and for perturbations
around them, we build a family of metrics depending upon a single periodic
function defined on the torus spanned by the $U(1)$ isometry directions. We
show that this set of metrics is equipped with a consistent symplectic
structure and hence defines a phase space. The phase space forms a
representation of an infinite dimensional algebra of so-called symplectic
symmetries. The symmetry algebra is an extension of the Virasoro algebra whose
central extension is the black hole entropy. We motivate the choice of
diffeomorphisms leading to the phase space and explicitly derive the symplectic
structure, the algebra of symplectic symmetries and the corresponding conserved
charges. We also discuss a formulation of these charges with a Liouville type
stress-tensor on the torus defined by the $U(1)$ isometries and outline
possible future directions.Comment: 56 pages, 3 figure | Wiggling Throat of Extremal Black Holes | wiggling throat of extremal black holes | geometries horizon extremal holes announced motivated uniqueness theorems perturbations build metrics torus spanned isometry directions. metrics equipped symplectic defines space. infinite symplectic symmetries. virasoro entropy. motivate diffeomorphisms explicitly derive symplectic symplectic symmetries conserved charges. formulation charges liouville torus isometries outline pages | non_dup | [] |
29532347 | 10.1007/JHEP10(2015)095 | In this article, I have studied the cosmological and particle physics
constraints on a generic class of large field ($|\Delta\phi|>M_{p}$) and small
field ($|\Delta\phi<M_{p}$) models of brane inflationary magnetic field from:
(1) tensor-to-scalar ratio ($r$), (2) reheating, (3) leptogenesis and (4)
baryogenesis in case of Randall-Sundrum single braneworld gravity (RSII)
framework. I also establish a direct connection between the magnetic field at
the present epoch ($B_{0}$) and primordial gravity waves ($r$), which give a
precise estimate of non-vanishing CP asymmetry ($\epsilon_{CP}$) in
leptogenesis and baryon asymmetry ($\eta_{B}$) in baryogenesis scenario
respectively. Further assuming the conformal invariance to be restored after
inflation in the framework of RSII, I have explicitly shown that the
requirement of the sub-dominant feature of large scale coherent magnetic field
after inflation gives two fold non-trivial characteristic constraints- on
equation of state parameter ($w$) and the corresponding energy scale during
reheating ($\rho^{1/4}_{rh}$) epoch. Hence giving the proposal for avoiding the
contribution of back-reaction from the magnetic field I have established a
bound on the generic reheating characteristic parameter ($R_{rh}$) and its
rescaled version ($R_{sc}$), to achieve large scale magnetic field within the
prescribed setup and further apply the CMB constraints as obtained from
recently observed Planck 2015 data and Planck+BICEP2+Keck Array joint
constraints. Using all these derived results I have shown that it is possible
to put further stringent constraints on various classes of large and small
field inflationary models to break the degeneracy between various cosmological
parameters within the framework of RSII. Finally, I have studied the
consequences from two specific models of brane inflation- monomial and hilltop.Comment: 67 pages, 14 figures, Final version, Accepted for publication in JHE | Constraining brane inflationary magnetic field from cosmoparticle
physics after Planck | constraining brane inflationary magnetic field from cosmoparticle physics after planck | cosmological generic delta delta brane inflationary reheating leptogenesis baryogenesis randall sundrum braneworld rsii framework. establish connection epoch primordial precise vanishing asymmetry epsilon leptogenesis baryon asymmetry baryogenesis respectively. conformal invariance restored inflation rsii explicitly requirement coherent inflation trivial reheating epoch. giving proposal avoiding generic reheating rescaled prescribed setup planck planck bicep keck array constraints. stringent inflationary break degeneracy cosmological rsii. consequences brane inflation monomial pages publication | non_dup | [] |
29537805 | 10.1007/JHEP10(2015)097 | Previous work has demonstrated that the gravitational field equations in all
Lanczos-Lovelock models imply a thermodynamic identity TdS=dE+PdV (where the
variations are interpreted as changes due to virtual displacement along the
affine parameter) in the near-horizon limit in static spacetimes. Here we
generalize this result to any arbitrary null surface in an arbitrary spacetime
and show that certain components of the Einstein's equations can be expressed
in the form of the above thermodynamic identity. We also obtain an explicit
expression for the thermodynamic energy associated with the null surface. Under
appropriate limits, our expressions reduce to those previously derived in the
literature. The components of the field equations used in obtaining the current
result are orthogonal to the components used previously to obtain another
related result, viz. that some components of the field equations reduce to a
Navier-Stokes equation on any null surface, in any spacetime. We also describe
the structure of Einstein's equations near a null surface in terms of three
well-defined projections and show how the different results complement each
other.Comment: v2, 25 pages, no figures, to appear in JHE | Gravitational field equations near an arbitrary null surface expressed
as a thermodynamic identity | gravitational field equations near an arbitrary null surface expressed as a thermodynamic identity | gravitational lanczos lovelock imply thermodynamic interpreted virtual displacement affine horizon spacetimes. generalize spacetime einstein thermodynamic identity. thermodynamic surface. expressions literature. obtaining orthogonal viz. navier stokes spacetime. einstein projections complement pages | non_dup | [] |
29560234 | 10.1007/JHEP10(2015)098 | Causal horizons in pure Poincare $AdS$ are Killing horizons generated by
dilatation vector. Renormalization group (RG) flow breaks the dilatation
symmetry and makes the horizons dynamical. We propose that the boundary RG flow
is dual to the thermodynamics of the causal horizon. As a check of our proposal
we show that the gravity dual of the boundary $c$-theorem is the second law of
thermodynamics obeyed by causal horizons. The holographic $c$-function is the
Bekenstein-Hawking entropy (density) of the dynamical causal horizon. We
explicitly construct the $c$-function in a generic class of RG-flow geometries
and show that it interpolates monotonically between the UV and IR central
charges as a result of the second law.Comment: 15 pages, Latex, references added, figures added , relation to causal
holographic information clarified, version accepted for publication in JHEP,
references adde | RG Flow and Thermodynamics of Causal Horizons in AdS | rg flow and thermodynamics of causal horizons in ads | causal horizons poincare killing horizons dilatation vector. renormalization breaks dilatation horizons dynamical. propose thermodynamics causal horizon. check proposal thermodynamics obeyed causal horizons. holographic bekenstein hawking causal horizon. explicitly generic geometries interpolates monotonically charges pages latex causal holographic clarified publication jhep adde | non_dup | [] |
29563271 | 10.1007/JHEP10(2015)100 | Ho\v{r}ava gravity has been proposed as a renormalizable, higher-derivative
gravity without ghost problems, by considering different scaling dimensions for
space and time. In the non-relativistic higher-derivative generalization of
Einstein gravity, the meaning and physical properties of black hole and
membrane space-times are quite different from the conventional ones. Here, we
study the singularity and horizon structures of such geometries in IR-modified
Ho\v{r}ava gravity, where the so-called "detailed balance" condition is softly
broken in IR. We classify all the viable static solutions without naked
singularities and study its close connection to non-singular cosmology
solutions. We find that, in addition to the usual point-like singularity at
$r=0$, there exists a "surface-like" curvature singularity at finite $r=r_S$
which is the cutting edge of the real-valued space-time. The degree of
divergence of such singularities is milder than those of general relativity,
and the Hawking temperature of the horizons diverges when they coincide with
the singularities. As a byproduct we find that, in addition to the usual
"asymptotic limit," a consistent flow of coupling constants, that we called "GR
flow limit," is needed in order to recover general relativity in the IR.Comment: Accepted in JHEP, Typos correcte | Complete Classification of Four-Dimensional Black Hole and Membrane
Solutions in IR-modified Ho\v{r}ava Gravity | complete classification of four-dimensional black hole and membrane solutions in ir-modified ho\v{r}ava gravity | renormalizable ghost time. relativistic generalization einstein meaning ones. singularity horizon geometries balance softly broken classify viable naked singularities connection singular cosmology solutions. usual singularity curvature singularity cutting valued time. divergence singularities milder relativity hawking horizons diverges coincide singularities. byproduct usual asymptotic recover relativity jhep typos correcte | non_dup | [] |
42129372 | 10.1007/JHEP10(2015)103 | We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For Q-lattices and one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions | Thermoelectric DC conductivities and Stokes flows on black hole horizons. | thermoelectric dc conductivities and stokes flows on black hole horizons. | electrically holes einstein maxwell holographically conformal break translation invariance explicitly. examine linearised perturbations thermoelectric conductivity. decoupled horizon solve generalised stokes fluid. solving conductivity theory. lattices lattices solve expressions conductivity horizon. conductivity lattices expanded perturbative translationally | non_dup | [] |
29553471 | 10.1007/JHEP10(2015)105 | By utilizing the scaling symmetry of the reduced action for planar black
holes, we obtain the corresponding conserved charge. We use the conserved
charge to find the generalized Smarr relation of static hairy planar black
holes in various dimensions. Our results not only reproduce the relation in the
various known cases but also give the new relation in the Lifshitz planar black
holes with the scalar hair.Comment: 1+22 pages, plain LaTex; v2: minor improvements, fixed typos; v3
version to appear in JHE | Scaling symmetry and scalar hairy Lifshitz black holes | scaling symmetry and scalar hairy lifshitz black holes | utilizing planar holes conserved charge. conserved smarr hairy planar holes dimensions. reproduce lifshitz planar holes pages plain latex minor improvements typos | non_dup | [] |
29542570 | 10.1007/JHEP10(2015)107 | Non-uniform black strings (NUBS) are studied by the large $D$ effective
theory approach. By solving the near-horizon geometry in the $1/D$ expansion,
we obtain the effective equation for the deformed horizon up to the
next-to-next-to-leading order (NNLO) in $1/D$. We also solve the far-zone
geometry by the Newtonian approximation. Matching the near and far zones, the
thermodynamic variables are computed in the $1/D$ expansion. As the result, the
large $D$ analysis gives a critical dimension $D_*\simeq13.5$ at which the
translation-symmetry-breaking phase transition changes between first and second
order. This value of $D_*$ agrees perfectly, within the precision of the $1/D$
expansion, with the result previously obtained by E. Sorkin through the
numerical resolution. We also compare our NNLO results for the thermodynamics
of NUBS to earlier numerical calculations, and find good agreement within the
expected precision.Comment: 33 pages, 8 figures, Ancillary Mathematica notebook contains details
of NNLO results; v2: Published versio | Non-uniform black strings and the critical dimension in the $1/D$
expansion | non-uniform black strings and the critical dimension in the $1/d$ expansion | strings nubs approach. solving horizon deformed horizon nnlo solve newtonian approximation. matching zones thermodynamic expansion. simeq translation breaking order. agrees perfectly precision sorkin resolution. nnlo thermodynamics nubs pages ancillary mathematica notebook nnlo versio | non_dup | [] |
39331872 | 10.1007/JHEP10(2015)109 | Canonical tensor model (CTM for short below) is a rank-three tensor model formulated as a totally constrained system in the canonical formalism. In the classical case, the constraints form a first-class constraint Poisson algebra with structures similar to that of the ADM formalism of general relativity, qualifying CTM as a possible discrete formalism for quantum gravity. In this paper, we show that, in a formal continuum limit, the constraint Poisson algebra of CTM with no cosmological constant exactly reproduces that of the ADM formalism. To this end, we obtain the expression of the metric tensor field in general relativity in terms of one of the dynamical rank-three tensors in CTM, and determine the correspondence between the constraints of CTM and those of the ADM formalism. On the other hand, the cosmological constant term of CTM seems to induce non-local dynamics, and is inconsistent with an assumption about locality of the continuum limit | Constraint algebra of general relativity from a formal continuum limit of canonical tensor model | constraint algebra of general relativity from a formal continuum limit of canonical tensor model | canonical formulated totally constrained canonical formalism. poisson formalism relativity qualifying formalism gravity. formal continuum poisson cosmological reproduces formalism. relativity tensors correspondence formalism. cosmological induce inconsistent locality continuum | non_dup | [] |
29557034 | 10.1007/JHEP10(2015)112 | In a clean quantum critical metal, and in the absence of umklapp, most d.c.
conductivities are formally infinite due to momentum conservation. However,
there is a particular combination of the charge and heat currents which has a
finite, universal conductivity. In this paper, we describe the physics of this
conductivity $\sigma_Q$ in quantum critical metals obtained by charge doping a
strongly interacting conformal field theory. We show that it satisfies an
Einstein relation and controls the diffusivity of a conserved charge in the
metal. We compute $\sigma_Q$ in a class of theories with holographic
gravitational duals. Finally, we show how the temperature scaling of $\sigma_Q$
depends on certain critical exponents characterizing the quantum critical
metal. The holographic results are found to be reproduced by the scaling
analysis, with the charge density operator becoming marginal in the emergent
low energy quantum critical theory.Comment: v1: 1 + 16 pages + reference | Incoherent transport in clean quantum critical metals | incoherent transport in clean quantum critical metals | clean umklapp d.c. conductivities formally infinite conservation. currents universal conductivity. conductivity sigma metals doping interacting conformal theory. satisfies einstein diffusivity conserved metal. sigma holographic gravitational duals. sigma exponents characterizing metal. holographic reproduced becoming marginal emergent pages | non_dup | [] |
29551467 | 10.1007/JHEP10(2015)115 | We update predictions for lepton fluxes from the hadroproduction of charm
quarks in the scattering of primary cosmic rays with the Earth's atmosphere.
The calculation of charm-pair hadroproduction applies the latest results from
perturbative QCD through next-to-next-to-leading order and modern parton
distributions, together with estimates on various sources of uncertainties. Our
predictions for the lepton fluxes turn out to be compatible, within the
uncertainty band, with recent results in the literature. However, by taking
into account contributions neglected in previous works, our total uncertainties
are much larger. The predictions are crucial for the interpretation of results
from neutrino experiments like IceCube, when disentangling signals of neutrinos
of astrophysical origin from the atmospheric background.Comment: 40 pages, 24 figure | Lepton fluxes from atmospheric charm revisited | lepton fluxes from atmospheric charm revisited | update lepton fluxes hadroproduction charm quarks cosmic rays earth atmosphere. charm hadroproduction applies latest perturbative modern parton uncertainties. lepton fluxes compatible literature. neglected larger. crucial icecube disentangling neutrinos astrophysical pages | non_dup | [] |
29551820 | 10.1007/JHEP10(2015)118 | The hints from the LHC for the existence of a $W'$ boson of mass around 1.9
TeV point towards a certain $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ gauge
theory with an extended Higgs sector. We show that the decays of the $W'$ boson
into heavy Higgs bosons have sizable branching fractions. Interpreting the
ATLAS excess events in the search for same-sign lepton pairs plus $b$ jets as
arising from $W'$ cascade decays, we estimate that the masses of the heavy
Higgs bosons are in the 400--700 GeV range.Comment: 22 pages; v2: Eqs. 3.6 and 3.8 corrected, clarifications and
references adde | Heavy Higgs bosons and the 2 TeV $W'$ boson | heavy higgs bosons and the 2 tev $w'$ boson | hints boson sector. decays boson bosons sizable branching fractions. interpreting atlas excess lepton jets arising cascade decays bosons pages eqs. corrected clarifications adde | non_dup | [] |
29548720 | 10.1007/JHEP10(2015)120 | We determine the supersymmetric AdS_7 backgrounds of seven-dimensional
half-maximal gauged supergravities and show that they do not admit any
deformations that preserve all 16 supercharges. We compare this result to the
conformal manifold of the holographically dual (1,0) superconformal field
theories and show that accordingly its representation theory implies that no
supersymmetric marginal operators exist.Comment: 20 pages, corrected classification of non-semisimple gauge groups,
version to appear in JHE | Supersymmetric AdS_7 backgrounds in half-maximal supergravity and
marginal operators of (1,0) SCFTs | supersymmetric ads_7 backgrounds in half-maximal supergravity and marginal operators of (1,0) scfts | supersymmetric backgrounds seven maximal gauged supergravities admit deformations preserve supercharges. conformal manifold holographically superconformal accordingly supersymmetric marginal pages corrected semisimple | non_dup | [] |
29539764 | 10.1007/JHEP10(2015)122 | With the upcoming run of the Large Hadron Collider (LHC) at much higher
center of mass energies, the search for Beyond Standard Model (BSM) physics
will again take center stage. New colored particles predicted in many BSM
scenarios are expected to be produced with large cross sections thus making
them interesting prospects as a doorway to hints of new physics. We consider
the resonant production of such a colored particle, the diquark, a particle
having the quantum number of two quarks. The diquark can be either a scalar or
vector. We focus on the vector diquark which has much larger production cross
section compared to the scalar ones. In this work we calculate the
next-to-leading order (NLO) QCD corrections to the on-shell vector diquark
production at the LHC produced through the fusion of two quarks as well as the
NLO corrections to its decay width. We present full analytic results for the
one-loop NLO calculation and do a numerical study to show that the NLO
corrections can reduce the scale uncertainties in the cross sections which can
be appreciable and therefore modify the expected search limits for such
particles. We also use the dijet result from LHC to obtain current limits on
the mass and coupling strengths of the vector diquarks.Comment: Published in JHE | NLO QCD corrections to the resonant Vector Diquark production at the LHC | nlo qcd corrections to the resonant vector diquark production at the lhc | upcoming hadron collider stage. colored scenarios prospects doorway hints physics. resonant colored diquark quarks. diquark vector. diquark ones. diquark fusion quarks width. analytic appreciable modify particles. dijet strengths | non_dup | [] |
29550907 | 10.1007/JHEP10(2015)132 | We perform the first analysis of Dark Matter scenarios in a constrained model
with Dirac Gauginos. The model under investigation is the Constrained Minimal
Dirac Gaugino Supersymmetric Standard model (CMDGSSM) where the Majorana mass
terms of gauginos vanish. However, $R$-symmetry is broken in the Higgs sector
by an explicit and/or effective $B_\mu$-term. This causes a mass splitting
between Dirac states in the fermion sector and the neutralinos, which provide
the dark matter candidate, become pseudo-Dirac states. We discuss two
scenarios: the universal case with all scalar masses unified at the GUT scale,
and the case with non-universal Higgs soft-terms. We identify different regions
in the parameter space which fullfil all constraints from the dark matter
abundance, the limits from SUSY and direct dark matter searches and the Higgs
mass. Most of these points can be tested with the next generation of direct
dark matter detection experiments.Comment: 28 pages, 11 figures; v2: minor changes, title modified; matches
published versio | Dark matter scenarios in a constrained model with Dirac gauginos | dark matter scenarios in a constrained model with dirac gauginos | scenarios constrained dirac gauginos. constrained dirac gaugino supersymmetric cmdgssm majorana gauginos vanish. broken term. splitting dirac fermion neutralinos candidate pseudo dirac states. scenarios universal unified universal terms. fullfil abundance susy searches mass. pages minor title matches versio | non_dup | [] |
29545421 | 10.1007/JHEP10(2015)135 | The standard picture of electroweak baryogenesis requires slowly expanding
bubbles. This can be difficult to achieve if the vacuum expectation value of a
gauge singlet scalar field changes appreciably during the electroweak phase
transition. It is important to determine the bubble wall velocity in this case,
since the predicted baryon asymmetry can depend sensitively on its value. Here,
this calculation is discussed and illustrated in the real singlet extension of
the Standard Model. The friction on the bubble wall is computed using a kinetic
theory approach and including hydrodynamic effects. Wall velocities are found
to be rather large ($v_w \gtrsim 0.2$) but compatible with electroweak
baryogenesis in some portions of the parameter space. If the phase transition
is strong enough, however, a subsonic solution may not exist, precluding
non-local electroweak baryogenesis altogether. The results presented here can
be used in calculating the baryon asymmetry in various singlet-driven
scenarios, as well as other features related to cosmological phase transitions
in the early Universe, such as the resulting spectrum of gravitational
radiation.Comment: v2: matches version published in JHE | Bubble Expansion and the Viability of Singlet-Driven Electroweak
Baryogenesis | bubble expansion and the viability of singlet-driven electroweak baryogenesis | picture electroweak baryogenesis slowly expanding bubbles. expectation singlet appreciably electroweak transition. bubble baryon asymmetry sensitively value. illustrated singlet model. friction bubble hydrodynamic effects. velocities gtrsim compatible electroweak baryogenesis portions space. subsonic precluding electroweak baryogenesis altogether. calculating baryon asymmetry singlet scenarios cosmological universe gravitational matches | non_dup | [] |
71061535 | 10.1007/JHEP10(2015)139 | In this paper we present a novel CPT symmetry test in the neutral kaon system based, for the first time, on the direct comparison of the probabilities of a transition and its CPT reverse. The required interchange of in out states for a given process is obtained exploiting the Einstein-Podolsky-Rosen correlations of neutral kaon pairs produced at a phi-factory. The observable quantities have been constructed by selecting the two semileptonic decays for flavour tag, the pi and 3 pi(0) decays for CP tag and the time orderings of the decay pairs. The interpretation in terms of the standard Weisskopf-Wigner approach to this system, directly connects CPT violation in these observables to the violating R delta parameter in the mass matrix of K-0 (K) over bar (0), a genuine CPT violating effect independent of Delta Gamma and not requiring the decay as an essential ingredient. Possible spurious effects induced by CP violation in the decay and/or a violation of the Delta S = Delta Q rule have been shown to be well under control. The proposed test is thus fully robust, and might shed light on possible new CPT violating mechanisms, or further improve the precision of the present experimental limits. It could be implemented at the DA Phi NE facility in Frascati, where the KLOE-2 experiment might reach a statistical sensitivity of O (10(-3)) on the newly proposed observable quantities | Probing CPT in transitions with entangled neutral kaons | probing cpt in transitions with entangled neutral kaons | neutral kaon probabilities reverse. interchange exploiting einstein podolsky rosen neutral kaon factory. observable quantities selecting semileptonic decays flavour decays orderings pairs. weisskopf wigner connects violation observables violating delta genuine violating delta gamma requiring ingredient. spurious violation violation delta delta control. robust shed violating precision limits. implemented facility frascati kloe newly observable quantities | non_dup | [] |
29548294 | 10.1007/JHEP10(2015)140 | We initiate the study of $1/2$ BPS Wilson loops in $\mathcal{N}=4$
Chern-Simons-matter theories in three dimensions. We consider a circular or
linear quiver with Chern-Simons levels $k$, $-k$ and $0$, and focus on loops
preserving one of the two $SU(2)$ subgroups of the $R$-symmetry. In the cases
with no vanishing Chern-Simons levels, we find a pair of Wilson loops for each
pair of adjacent nodes on the quiver connected by a hypermultiplet (nodes
connected by twisted hypermultiplets have Wilson loops preserving another set
of supercharges). We expect this classical pairwise degeneracy to be lifted by
quantum corrections. In the case with nodes with vanishing Chern-Simons terms
connected by twisted hypermultiplets, we find that the usual $1/4$ BPS Wilson
loops are automatically enlarged to $1/2$ BPS, as happens also in 3-dimensional
Yang-Mills theory. When the nodes with vanishing Chern-Simons levels are
connected by untwisted hypermultiplets, we do not find any Wilson loops
coupling to those nodes which are classically invariant. Rather, we find
several loops whose supersymmetry variation, while non zero, vanishes in any
correlation function, so is weakly zero. We expect only one linear combination
of those Wilson loops to remain BPS when quantum corrections are included. We
analyze the M-theory duals of those Wilson loops and comment on their
degeneracy. We also show that these Wilson loops are cohomologically equivalent
to certain $1/4$ BPS Wilson loops whose expectation value can be evaluated by
the appropriate localized matrix model.Comment: 40 page | A profusion of $1/2$ BPS Wilson loops in $\mathcal{N}=4$
Chern-Simons-matter theories | a profusion of $1/2$ bps wilson loops in $\mathcal{n}=4$ chern-simons-matter theories | initiate wilson loops mathcal chern simons dimensions. circular quiver chern simons loops preserving subgroups symmetry. vanishing chern simons wilson loops adjacent quiver hypermultiplet twisted hypermultiplets wilson loops preserving supercharges pairwise degeneracy lifted corrections. vanishing chern simons twisted hypermultiplets usual wilson loops automatically enlarged happens mills theory. vanishing chern simons untwisted hypermultiplets wilson loops classically invariant. loops supersymmetry vanishes weakly zero. wilson loops included. analyze duals wilson loops comment degeneracy. wilson loops cohomologically wilson loops expectation localized | non_dup | [] |