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42680251 | 10.1007/JHEP11(2016)058 | In this short notes using AGT correspondence we express simplest fully
degenerate primary fields of Toda field theory in terms an analogue of Baxter's
$Q$-operator naturally emerging in ${\cal N}=2$ gauge theory side. This
quantity can be considered as a generating function of simple trace chiral
operators constructed from the scalars of the ${\cal N}=2$ vector multiplets.
In the special case of Liouville theory, exploring the second order
differential equation satisfied by conformal blocks including a degenerate at
the second level primary field (BPZ equation) we derive a mixed
difference-differential relation for $Q$-operator. Thus we generalize the
$T$-$Q$ difference equation known in Nekrasov-Shatashvili limit of the
$\Omega$-background to the generic case.Comment: 10 pages, 2 figure | VEV of Baxter's Q-operator in N=2 gauge theory and the BPZ differential
equation | vev of baxter's q-operator in n=2 gauge theory and the bpz differential equation | notes correspondence express simplest degenerate toda analogue baxter naturally emerging side. quantity generating trace chiral scalars multiplets. liouville exploring satisfied conformal blocks degenerate derive operator. generalize nekrasov shatashvili omega generic pages | non_dup | [] |
73383696 | 10.1007/JHEP11(2016)059 | We study $N=(2,4,8)$ supersymmetric extensions of the three dimensional BMS
algebra (BMS$_3$) with most generic possible central extensions. We find that
$N$-extended supersymmetric BMS$_3$ algebras can be derived by a suitable
contraction of two copies of the extended superconformal algebras. Extended
algebras from all the consistent contractions are obtained by scaling
left-moving and right-moving supersymmetry generators symmetrically, while
Virasoro and R-symmetry generators are scaled asymmetrically. On the way, we
find that the BMS/GCA correspondence does not in general hold for
supersymmetric systems. Using the $\beta$-$\gamma$ and the ${\mathfrak
b}$-${\mathfrak c}$ systems, we construct free field realisations of all the
extended super-BMS$_3$ algebras.Comment: 25 pages, 1 tabl | Extended Supersymmetric BMS$_3$ algebras and Their Free Field
Realisations | extended supersymmetric bms$_3$ algebras and their free field realisations | supersymmetric extensions generic extensions. supersymmetric algebras contraction copies superconformal algebras. algebras contractions moving moving supersymmetry generators symmetrically virasoro generators scaled asymmetrically. correspondence hold supersymmetric systems. beta gamma mathfrak mathfrak realisations super pages tabl | non_dup | [] |
73377384 | 10.1007/JHEP11(2016)062 | We discover that the 26D open bosonic string scattering amplitudes (SSA) of
three tachyons and one arbitrary string state can be expressed in terms of the
D-type Lauricella functions with associated SL(K+3,C) symmetry. As a result,
SSA and symmetries or relations among SSA of different string states at various
limits calculated previously can be rederived. These include the linear
relations first conjectured by Gross [1-3] and later corrected and proved in
[4-9] in the hard scattering limit, the recurrence relations in the Regge
scattering limit with associated SL(5,C) symmetry [19-21] and the extended
recurrence relations in the nonrelativistic scattering limit with associated
SL(4,C) symmetry [24] discovered recently. Finally, as an application, we
calculate a new recurrence relation of SSA which is valid for all energies.Comment: 20 pages, no figure, extended form of arXiv:1603.0039 | The Lauricella Functions and Exact String Scattering Amplitudes | the lauricella functions and exact string scattering amplitudes | discover bosonic amplitudes tachyons lauricella symmetry. symmetries rederived. conjectured gross corrected proved recurrence regge recurrence nonrelativistic discovered recently. recurrence valid pages | non_dup | [] |
42744783 | 10.1007/JHEP11(2016)063 | We prove that, for M theory or type II, generic Minkowski flux backgrounds
preserving $\mathcal{N}$ supersymmetries in dimensions $D\geq4$ correspond
precisely to integrable generalised $G_{\mathcal{N}}$ structures, where
$G_{\mathcal{N}}$ is the generalised structure group defined by the Killing
spinors. In other words, they are the analogues of special holonomy manifolds
in $E_{d(d)} \times\mathbb{R}^+$ generalised geometry. In establishing this
result, we introduce the Kosmann-Dorfman bracket, a generalisation of Kosmann's
Lie derivative of spinors. This allows us to write down the internal sector of
the Killing superalgebra, which takes a rather simple form and whose closure is
the key step in proving the main result. In addition, we find that the
eleven-dimensional Killing superalgebra of these backgrounds is necessarily the
supertranslational part of the $\mathcal{N}$-extended super-Poincar\'e algebra.Comment: 34 page | Supersymmetric Backgrounds, the Killing Superalgebra, and Generalised
Special Holonomy | supersymmetric backgrounds, the killing superalgebra, and generalised special holonomy | generic minkowski backgrounds preserving mathcal supersymmetries precisely integrable generalised mathcal mathcal generalised killing spinors. analogues holonomy manifolds mathbb generalised geometry. establishing kosmann dorfman bracket generalisation kosmann spinors. killing superalgebra closure proving result. eleven killing superalgebra backgrounds necessarily supertranslational mathcal super poincar | non_dup | [] |
73350180 | 10.1007/JHEP11(2016)064 | We study T-duality chains of five-branes in heterotic supergravity where the
first order $\alpha'$-corrections are present. By performing the
$\alpha'$-corrected T-duality transformations of the heterotic NS5-brane
solutions, we obtain the KK5-brane and the exotic $5^2_2$-brane solutions
associated with the symmetric, the neutral and the gauge NS5-branes. We find
that the Yang-Mills gauge field in these solutions satisfies the self-duality
condition in the three- and two-dimensional transverse spaces to the brane
world-volumes. The $O(2,2)$ monodromy structures of the $5^2_2$-brane solutions
are investigated by the $\alpha'$-corrected generalized metric. Our analysis
shows that the symmetric $5^2_2$-brane solution, which satisfies the standard
embedding condition, is a T-fold and it exhibits the non-geometric nature. We
also find that the neutral $5^2_2$-brane solution is a T-fold at least at
$\mathcal{O} (\alpha')$. On the other hand, the gauge $5^2_2$-brane solution is
not a T-fold but show unusual structures of space-time.Comment: 26 pages, 1 figure, a reference added, typos corrected, publish
versio | Non-geometric Five-branes in Heterotic Supergravity | non-geometric five-branes in heterotic supergravity | duality chains branes heterotic supergravity alpha present. performing alpha corrected duality transformations heterotic brane brane exotic brane neutral branes. mills satisfies duality brane volumes. monodromy brane alpha corrected metric. brane satisfies embedding exhibits geometric nature. neutral brane mathcal alpha brane unusual pages typos corrected publish versio | non_dup | [] |
73352950 | 10.1007/JHEP11(2016)065 | CP violation of the SM is insufficient to explain the baryon asymmetry in the
universe and therefore an additional source of CP violation is needed. Here the
extension of the SM by a neutral complex scalar singlet with a nonzero vacuum
expectation value (cSMCS) plus a heavy vector quark pair is considered. This
model offers the spontaneous CP violation and proper description in the
baryogenesis, it leads strong enough first-order electro-weak phase transition
to suppress the baryon-violating sphaleron process.Comment: Typos in the caption Fig. 2 and Eq.(26) are corrected and
acknowledgment has been adde | Baryogenesis of the Universe in cSMCS Model plus Iso-Doublet Vector
Quark | baryogenesis of the universe in csmcs model plus iso-doublet vector quark | violation insufficient baryon asymmetry universe violation needed. neutral singlet nonzero expectation csmcs considered. offers spontaneous violation proper baryogenesis electro suppress baryon violating sphaleron typos caption fig. corrected acknowledgment adde | non_dup | [] |
42750429 | 10.1007/JHEP11(2016)066 | Motivated by a class of flux compactifications of type IIA strings on rigid
Calabi-Yau manifolds, preserving N=2 local supersymmetry in four dimensions, we
derive a non-perturbative potential of all scalar fields from the exact
D-instanton corrected metric on the hypermultiplet moduli space. Applying this
potential to moduli stabilization, we find a discrete set of exact vacua for
axions. At these critical points, the stability problem is decoupled into two
subspaces spanned by the axions and the other fields (dilaton and Kahler
moduli), respectively. Whereas the stability of the axions is easily achieved,
numerical analysis shows instabilities in the second subspace.Comment: 38 pages; some changes in presentatio | Non-perturbative scalar potential inspired by type IIA strings on rigid
CY | non-perturbative scalar potential inspired by type iia strings on rigid cy | motivated compactifications strings rigid calabi manifolds preserving supersymmetry derive perturbative instanton corrected hypermultiplet moduli space. moduli stabilization vacua axions. decoupled subspaces spanned axions dilaton kahler moduli respectively. axions instabilities pages presentatio | non_dup | [] |
42705191 | 10.1007/JHEP11(2016)067 | The $R+R^2$, shortly named "$R^2$" ("Starobinsky") inflationary model,
represents a fully consistent example of a one-parameter inflationary scenario.
This model has a "graceful exit" from inflation and provides a mechanism for
subsequent creation and final thermalization of the standard matter. Moreover,
it produces a very good fit of the observed spectrum of primordial
perturbations. In the present paper we show explicitly that the $R^2$
inflationary spacetime is an exact solution of a range of weakly non-local
(quasi-polynomial) gravitational theories, which provide an ultraviolet
completion of the $R^2$ theory. These theories are ghost-free,
super-renormalizable or finite at quantum level, and perturbatively unitary.
Their spectrum consists of the graviton and the scalaron that is responsible
for driving the inflation. Notably, any further extension of the spectrum leads
to propagating ghost degrees of freedom. We are aimed at presenting a detailed
construction of such theories in the so called Weyl basis. Further, we give a
special account to the cosmological implications of this theory by considering
perturbations during inflation. The highlight of the non-local model is the
prediction of a modified, in comparison to a local $R^2$ model, value for the
ratio of tensor and scalar power spectra $r$, depending on the parameters of
the theory. The relevant parameters are under control to be successfully
confronted with existing observational data. Furthermore, the modified $r$ can
surely meet future observational constraints.Comment: 41 pages; minor corrections and presentation improvement; matches the
published versio | Occurrence of exact $R^2$ inflation in non-local UV-complete gravity | occurrence of exact $r^2$ inflation in non-local uv-complete gravity | shortly named starobinsky inflationary inflationary scenario. graceful exit inflation creation thermalization matter. produces primordial perturbations. explicitly inflationary spacetime weakly quasi gravitational ultraviolet completion theory. ghost super renormalizable perturbatively unitary. graviton scalaron driving inflation. notably propagating ghost freedom. aimed presenting weyl basis. cosmological perturbations inflation. highlight theory. successfully confronted observational data. surely meet observational pages minor presentation matches versio | non_dup | [] |
42670538 | 10.1007/JHEP11(2016)068 | In a conformal field theory with weakly broken higher spin symmetry, the
leading order anomalous dimensions of the broken currents can be efficiently
determined from the structure of the classical non-conservation equations. We
apply this method to the explicit example of $O(N)$ invariant scalar field
theories in various dimensions, including the large $N$ critical $O(N)$ model
in general $d$, the Wilson-Fisher fixed point in $d=4-\epsilon$, cubic scalar
models in $d=6-\epsilon$ and the nonlinear sigma model in $d=2+\epsilon$. Using
information from the $d=4-\epsilon$ and $d=2+\epsilon$ expansions, we obtain
some estimates for the dimensions of the higher spin operators in the critical
3d $O(N)$ models for a few low values of $N$ and spin.Comment: 39 pages, 1 figure. v2: minor correction | Anomalous dimensions in CFT with weakly broken higher spin symmetry | anomalous dimensions in cft with weakly broken higher spin symmetry | conformal weakly broken anomalous broken currents efficiently conservation equations. wilson fisher epsilon cubic epsilon sigma epsilon epsilon epsilon expansions pages figure. minor | non_dup | [] |
42747599 | 10.1007/JHEP11(2016)069 | We discuss an interesting class of models, based on strongly coupled Dark
Matter (DM), where sizable effects can be expected in LHC missing energy (MET)
searches, compatibly with a large separation of scales. In this case, an
effective field theory (EFT) is appropriate (and sometimes necessary) to
describe the most relevant interactions at the LHC. The selection rules implied
by the structure of the new strong dynamics shape the EFT in an unusual way,
revealing the importance of higher-derivative interactions previously ignored.
We compare indications from relic density and direct detection experiments with
consistent LHC constraints, and asses the relative importance of the latter.
Our analysis provides an interesting and well-motivated scenario to model MET
at the LHC in terms of a handful of parameters.Comment: 27 pages + appendices, 7 figure | The Last Gasp of Dark Matter Effective Theory | the last gasp of dark matter effective theory | sizable missing searches compatibly scales. sometimes lhc. implied unusual revealing ignored. indications relic asses latter. motivated handful pages appendices | non_dup | [] |
42695104 | 10.1007/JHEP11(2016)070 | Serious searches for the weakly interacting massive particle (WIMP) have now
begun. In this context, the most important questions that need to be addressed
are: "To what extent can we constrain the WIMP models in the future?" and "What
will then be the remaining unexplored regions in the WIMP parameter space for
each of these models?" In our quest to answer these questions, we classify WIMP
in terms of quantum number and study each case adopting minimality as a guiding
principle. As a first step, we study one of the simple cases of the minimal
composition in the well-tempered fermionic WIMP regime, namely the
singlet-doublets WIMP model. We consider all available constraints from direct
and indirect searches and also the predicted constraints coming from the near
future and the future experiments. We thus obtain the current status, the near
future prospects and the future prospects of this model in all its generality.
We find that in the future, this model will be constrained almost solely by the
future direct dark matter detection experiments (as compared to the weaker
indirect and collider constraints) and the cosmological (relic density)
constraints and will hence be gradually pushed to the corner of the
coannihilation region, if no WIMP signal is detected. Future lepton colliders
will then be useful in exploring this region not constrained by any other
experiments.Comment: 34 pages, 6 figures; v2: minor corrections, published versio | WIMP Dark Matter in a Well-Tempered Regime: A case study on
Singlet-Doublets Fermionic WIMP | wimp dark matter in a well-tempered regime: a case study on singlet-doublets fermionic wimp | serious searches weakly interacting massive wimp begun. addressed constrain wimp unexplored wimp quest answer classify wimp adopting minimality guiding principle. tempered fermionic wimp singlet doublets wimp model. indirect searches coming experiments. prospects prospects generality. constrained solely weaker indirect collider cosmological relic gradually pushed corner coannihilation wimp detected. lepton colliders exploring constrained pages minor versio | non_dup | [] |
42724900 | 10.1007/JHEP11(2016)071 | We consider a class of minimal anomaly free $\mathrm{U}(1)$ extensions of the
Standard Model with three generations of right-handed neutrinos and a complex
scalar. Using electroweak precision constraints, new 13 TeV LHC data, and
considering theoretical limitations such as perturbativity, we show that it is
possible to constrain a wide class of models. By classifying these models with
a single parameter, $\kappa$, we can put a model independent upper bound on the
new $\mathrm{U}(1)$ gauge coupling $g_z$. We find that the new dilepton data
puts strong bounds on the parameters, especially in the mass region
$M_{Z'}\lesssim 3~ \mathrm{TeV}$.Comment: 23 pages, 4 figures. Modified model parametrization, exclusion limits
with new dat | Constraining minimal anomaly free $\mathrm{U}(1)$ extensions of the
Standard Model | constraining minimal anomaly free $\mathrm{u}(1)$ extensions of the standard model | anomaly mathrm extensions generations handed neutrinos scalar. electroweak precision limitations perturbativity constrain models. classifying kappa mathrm dilepton puts bounds lesssim mathrm .comment pages figures. parametrization exclusion | non_dup | [] |
42718331 | 10.1007/JHEP11(2016)072 | In the SM gauge symmetries and fermion content of neutrinos, charged leptons
and quarks, we study the effective four-fermion operators of Einstein-Cartan
type and their contributions to the Schwinger-Dyson equations of fermion
self-energy functions. The study is motivated by the speculation that these
four-fermion operators are probably originated due to the quantum gravity that
provides the natural regularization for chiral-symmetric gauge field theories.
In the chiral-gauge symmetry breaking phase, as to achieve the energetically
favorable ground state, only the top-quark mass is generated via the
spontaneous symmetry breaking, and other fermion masses are generated via the
explicit symmetry breaking induced by the top-quark mass, four-fermion
interactions and fermion-flavor mixing matrices. A phase transition from the
symmetry breaking phase to the chiral-gauge symmetric phase at TeV scale occurs
and the drastically fine-tuning problem can be resolved. In the infrared
fixed-point domain of the four-fermion coupling for the SM at low energies, we
qualitatively obtain the hierarchy patterns of the SM fermion Dirac masses,
Yukawa couplings and family-flavor mixing matrices with three additional
right-handed neutrinos $\nu^f_R$. Large Majorana masses and lepton-symmetry
breaking are originated by the four-fermion interactions among $\nu^f_R$ and
their left-handed conjugated fields $\nu^{fc}_R$. Light masses of gauged
Majorana neutrinos in the normal hierarchy ($10^{-5}-10^{-2}$ eV) are obtained
consistently with neutrino oscillations. We present some discussions on the
composite Higgs phenomenology and forward-backward asymmetry of $t\bar
t$-production, as well as remarks on the candidates of light and heavy dark
matter particles (fermions, scalar and pseudoscalar bosons).Comment: In this article, the study of the third fermion family
(arXiv1506.05994 PRD93, 073001 (2016)) is generalized to the three fermion
families. This is an updated version 52 pages, 8 Figures and 2 table | Hierarchy spectrum of SM fermions: from top quark to electron neutrino | hierarchy spectrum of sm fermions: from top quark to electron neutrino | symmetries fermion neutrinos leptons quarks fermion einstein cartan schwinger dyson fermion functions. motivated speculation fermion probably originated regularization chiral theories. chiral breaking energetically favorable spontaneous breaking fermion breaking fermion fermion flavor matrices. breaking chiral drastically fine tuning resolved. infrared fermion qualitatively hierarchy fermion dirac yukawa couplings flavor handed neutrinos majorana lepton breaking originated fermion handed conjugated gauged majorana neutrinos hierarchy consistently oscillations. discussions composite phenomenology backward asymmetry remarks candidates fermions pseudoscalar bosons .comment fermion fermion families. updated pages | non_dup | [] |
29536265 | 10.1007/JHEP11(2016)073 | We compute the next-to-leading order term in the long-distance expansion of
the mutual information for free scalars in three space-time dimensions. The
geometry considered is two disjoint disks separated by a distance $r$ between
their centers. No evidence for non-analyticity in the R\'enyi parameter $n$ for
the continuation $n \rightarrow 1$ in the next-to-leading order term is found.Comment: 15 pages, This version contains few extra references, some technical
material has been move to appendices, and other minor modifications to match
with the version accepted for publicatio | Large distance expansion of Mutual Information for disjoint disks in a
free scalar theory | large distance expansion of mutual information for disjoint disks in a free scalar theory | mutual scalars dimensions. disjoint disks separated centers. analyticity enyi continuation rightarrow pages extra move appendices minor modifications match publicatio | non_dup | [] |
73347574 | 10.1007/JHEP11(2016)074 | We present all-multiplicity evidence that the tree-level S-matrix of gluons
and gravitons in heterotic string theory can be reduced to color-ordered
single-trace amplitudes of the gauge multiplet. Explicit amplitude relations
are derived for up to three gravitons, up to two color traces and an arbitrary
number of gluons in each case. The results are valid to all orders in the
inverse string tension $\alpha'$ and generalize to the ten-dimensional
superamplitudes which preserve 16 supercharges. Their field-theory limit
results in an alternative proof of the recently discovered relations between
Einstein-Yang-Mills amplitudes and those of pure Yang-Mills theory.
Similarities and differences between the integrands of the Cachazo-He-Yuan
formulae and the heterotic string are investigated.Comment: 29 pages; v2: cosmetic changes, references updated, published versio | Amplitude relations in heterotic string theory and Einstein-Yang-Mills | amplitude relations in heterotic string theory and einstein-yang-mills | multiplicity gluons gravitons heterotic ordered trace amplitudes multiplet. gravitons traces gluons case. valid orders tension alpha generalize superamplitudes preserve supercharges. discovered einstein mills amplitudes mills theory. similarities integrands cachazo yuan formulae heterotic pages cosmetic updated versio | non_dup | [] |
73362089 | 10.1007/JHEP11(2016)075 | Warped models with the Higgs in the bulk can generate light Kaluza-Klein (KK)
Higgs modes consistent with the electroweak precision analysis. The first KK
mode of the Higgs (h_{1}) could lie in the 1-2 TeV range in the models with a
bulk custodial symmetry. We find that the h_{1} is gaugephobic and decays
dominantly into a t\bar{t} pair. We also discuss the search strategy for h_{1}
decaying to t\bar{t} at the Large Hadron Collider. We used substructure tools
to suppress the large QCD background associated with this channel. We find that
h_{1} can be probed at the LHC run-2 with an integrated luminosity of 300
fb^{-1}.Comment: 18 pages, 8 figures, 1 tabl | A Higgs in the Warped Bulk and LHC signals | a higgs in the warped bulk and lhc signals | warped kaluza klein electroweak precision analysis. custodial symmetry. gaugephobic decays dominantly pair. decaying hadron collider. substructure suppress channel. probed luminosity .comment pages tabl | non_dup | [] |
42718510 | 10.1007/JHEP11(2016)076 | We provide a non-linear realisation of composite Higgs models in the context
of the SU(4)/Sp(4) symmetry breaking pattern, where the effective Lagrangian of
the spin-0 and spin-1 resonances is constructed via the CCWZ prescription using
the Hidden Symmetry formalism. We investigate the EWPT constraints by
accounting the effects from reduced Higgs couplings and integrating out heavy
spin-1 resonances. This theory emerges from an underlying theory of gauge
interactions with fermions, thus first principle lattice results predict the
massive spectrum in composite Higgs models. This model can be used as a
template for the phenomenology of composite Higgs models at the LHC and at
future 100 TeV colliders, as well as for other application. In this work, we
focus on the formalism for spin-1 resonances and their bounds from di-lepton
and di-boson searches at the LHC.Comment: 52 pages, 10 figures, 3 tables; v2 correct definition for G-parity,
update fermion currents and C-parity in table II, and add appendix B; v3
final version accepted by JHE | Vector and Axial-vector resonances in composite models of the Higgs
boson | vector and axial-vector resonances in composite models of the higgs boson | realisation composite breaking lagrangian resonances ccwz prescription hidden formalism. ewpt accounting couplings integrating resonances. emerges fermions predict massive composite models. template phenomenology composite colliders application. formalism resonances bounds lepton boson searches pages tables parity update fermion currents parity | non_dup | [] |
73359862 | 10.1007/JHEP11(2016)077 | We point out that a class of non-supersymmetric models based on the gauge
group $SU(3)_C \times SU(2)_L\times SU(2)_R\times U(1)_{Y_L}\times U(1)_{Y_R}$
possesses an automatic, exact $Z_{2 }$ symmetry under which the fermions in the
$SU(2)_R\times U(1)_{Y_R}$ sector (called $R$-sector) are odd and those in the
standard model sector (called $L$-sector) are even. This symmetry, which is
different from the usual parity symmetry of the left-right symmetric models,
persists in the lepton sector even after the gauge symmetry breaks down to
$SU(3)_C \times U(1)_{\rm EM}$. This keeps the lightest right-handed neutrino
naturally stable, thereby allowing it to play the role of dark matter (DM) in
the Universe. There are several differences between the usual left-right models
and the model presented here: (i) our model can have two versions, one which
has no parity symmetry so that the couplings and masses in the $L$ and $R$
sectors are unrelated, and another which has parity symmetry so that couplings
are related; (ii) the $R$-sector fermions are chosen much heavier than the
$L$-sector ones in both scenarios; and finally (iii) both light and heavy
neutrinos are Majorana fermions with the light neutrino masses arising from a
pure type-II seesaw mechanism. We discuss the DM relic density, direct and
indirect detection prospects and associated collider signatures of the model.
Comparing with current collider and direct detection constraints, we find a
lower bound on the DM mass of order of 1 TeV. We also point out a way to relax
the DM unitarity bound in our model for much larger DM masses by an entropy
dilution mechanism. An additional feature of the model is that the DM can be
made very long lived, if desired, by allowing for weak breaking of the above
$Z_{2}$ symmetry. Our model also predicts the existence of long-lived colored
particles which could be searched for at the LHC.Comment: 31 pages, 12 figures, 2 tables, version for publication in JHE | Naturally Stable Right-Handed Neutrino Dark Matter | naturally stable right-handed neutrino dark matter | supersymmetric possesses automatic fermions even. usual parity persists lepton breaks keeps lightest handed naturally thereby allowing universe. usual versions parity couplings sectors unrelated parity couplings fermions heavier scenarios neutrinos majorana fermions arising seesaw mechanism. relic indirect prospects collider signatures model. collider tev. relax unitarity dilution mechanism. lived desired allowing breaking symmetry. predicts lived colored searched pages tables publication | non_dup | [] |
73355587 | 10.1007/JHEP11(2016)078 | Combining Pati-Salam (PS) and flavour symmetries in a renormalisable setup,
we devise a scenario which produces realistic masses for the charged leptons.
Flavour-symmetry breaking scalar fields in the adjoint representations of the
PS gauge group are responsible for generating different flavour structures for
up- and down-type quarks as well as for leptons. The model is characterised by
new heavy fermions which mix with the Standard Model quarks and leptons. In
particular, the partners for the third fermion generation induce sizeable
sources of flavour violation. Focusing on the charged-lepton sector, we
scrutinise the model with respect to its implications for lepton-flavour
violating processes such as $\mu \rightarrow e\gamma$, $\mu\rightarrow 3e$ and
muon conversion in nuclei.Comment: 28 pages, 4 figure | Lepton-flavour violation in a Pati-Salam model with gauged flavour
symmetry | lepton-flavour violation in a pati-salam model with gauged flavour symmetry | combining pati salam flavour symmetries renormalisable setup devise produces realistic leptons. flavour breaking adjoint representations generating flavour quarks leptons. characterised fermions quarks leptons. partners fermion induce sizeable flavour violation. focusing lepton scrutinise lepton flavour violating rightarrow gamma rightarrow muon conversion pages | non_dup | [] |
73346918 | 10.1007/JHEP11(2016)079 | We discuss the $\{ \beta \}$-expansion for renormalization group invariant
quantities tracing this expansion to the different contractions of the
corresponding incomplete BPHZ $R$-operation. All of the coupling
renormalizations, which follow from these contractions, should be taken into
account for the $\{ \beta \}$-expansion. We illustrate this feature considering
the nonsinglet Adler function $D^\text{NS}$ in the third order of perturbation.
We propose a generalization of the $\{ \beta \}$-expansion for the
renormalization group covariant quantities -- the $\{ \beta,\gamma
\}$-expansion.Comment: 16 pages, 3 figures, a few editorial corrections for JHEP versio | The $\{\beta\}$-expansion formalism in perturbative QCD and its
extension | the $\{\beta\}$-expansion formalism in perturbative qcd and its extension | beta renormalization quantities tracing contractions incomplete bphz operation. renormalizations contractions beta expansion. illustrate nonsinglet adler perturbation. propose generalization beta renormalization covariant quantities beta gamma pages editorial jhep versio | non_dup | [] |
73359749 | 10.1007/JHEP11(2016)080 | The quantum $\tau_2$-model with generic site-dependent inhomogeneity and
arbitrary boundary fields is studied via the off-diagonal Bethe Ansatz method.
The eigenvalues of the corresponding transfer matrix are given in terms of an
inhomogeneous T-Q relation, which is based on the operator product identities
among the fused transfer matrices and the asymptotic behavior of the transfer
matrices. Moreover, the associated Bethe Ansatz equations are also obtained.Comment: 26 pages, no figures, published versio | Bethe ansatz solution of the $\tau_2$-model with arbitrary boundary
fields | bethe ansatz solution of the $\tau_2$-model with arbitrary boundary fields | generic inhomogeneity diagonal bethe ansatz method. eigenvalues inhomogeneous identities fused asymptotic matrices. bethe ansatz pages versio | non_dup | [] |
73356824 | 10.1007/JHEP11(2016)081 | We discuss R-parity violation (RPV) in semi-local and local F-theory
constructions. We first present a detailed analysis of all possible
combinations of RPV operators arising from semi-local F-theory spectral cover
constructions, assuming an $SU(5)$ GUT. We provide a classification of all
possible allowed combinations of RPV operators originating from operators of
the form $10\cdot \bar 5\cdot \bar 5$, including the effect of $U(1)$ fluxes
with global restrictions. We then relax the global constraints and perform
explicit computations of the bottom/tau and RPV Yukawa couplings, at an
$SO(12)$ local point of enhancement in the presence of general fluxes subject
only to local flux restrictions. We compare our results to the experimental
limits on each allowed RPV operator, and show that operators such as $LLe^c$,
$LQd^c$ and $u^cd^cd^c$ may be present separately within current bounds,
possibly on the edge of observability, suggesting lepton number violation or
neutron-antineutron oscillations could constrain F-theory models.Comment: 40 pages, 13 figures, minor correction | R-Parity violation in F-Theory | r-parity violation in f-theory | parity violation constructions. combinations arising cover constructions gut. combinations originating cdot cdot fluxes restrictions. relax computations yukawa couplings enhancement fluxes restrictions. separately bounds possibly observability lepton violation neutron antineutron oscillations constrain pages minor | non_dup | [] |
73350654 | 10.1007/JHEP11(2016)082 | Precision gauge coupling unification is one of the primary quantitative
successes of low energy or split supersymmetry. Preserving this success puts
severe restrictions on possible matter and gauge sectors that might appear at
collider-accessible energies. In this work we enumerate new gauge sectors which
are compatible with unification, consisting of horizontal gauge groups acting
on vector-like matter charged under the Standard Model. Interestingly, almost
all of these theories are in the supersymmetric conformal window at high
energies and confine quickly after the superpartners are decoupled. For a range
of scalar masses compatible with both moderately tuned and minimally split
supersymmetry, the confining dynamics happen at the multi-TeV scale, leading to
a spectrum of multiple spin-0 and spin-1 resonances accessible to the LHC, with
unusual quantum numbers and striking decay patterns.Comment: 27 pages, 6 figure | Unification and New Particles at the LHC | unification and new particles at the lhc | precision unification successes split supersymmetry. preserving success puts restrictions sectors collider accessible energies. enumerate sectors compatible unification consisting acting model. interestingly supersymmetric conformal window confine quickly superpartners decoupled. compatible moderately tuned minimally split supersymmetry confining happen resonances accessible unusual striking pages | non_dup | [] |
29568509 | 10.1007/JHEP11(2016)083 | We derive a rigorous classification of topologically stable Fermi surfaces of
non-interacting, discrete translation-invariant systems from electronic band
theory, adiabatic evolution and their topological interpretations. For systems
on an infinite crystal it is shown that there can only be topologically
unstable Fermi surfaces. For systems on a half- space and with a gapped bulk,
our derivation naturally yields a $\mathit{K}$-theory classification. Given the
$d-1$-dimensional surface Brillouin zone $\mathrm{X}_{s}$ of a $d$-dimensional
half-space, our result implies that different classes of globally stable Fermi
surfaces belong in $\mathit{K^{-1}}\mathrm{(X_{s})}$ for systems with only
discrete translation-invariance. This result has a chiral anomaly inflow
interpretation, as it reduces to the spectral flow for $d = 2$. Through
equivariant homotopy methods we extend these results for symmetry classes
$AI,\,AII,\, C$ and $D$ and discuss their corresponding anomaly inflow
interpretation.Comment: Removed Born-von Karman boundary conditions for $\mathbb{R}^{d}$ and
$\mathbb{R}^{d-1}\times [0,\infty)$ and includes the 'weak' topological phase
found by Kitaev for $\Xi^2 = I, d= 2 | Topology of Fermi Surfaces and anomaly inflows | topology of fermi surfaces and anomaly inflows | derive rigorous topologically fermi interacting translation adiabatic topological interpretations. infinite topologically unstable fermi surfaces. gapped derivation naturally mathit classification. brillouin mathrm globally fermi belong mathit mathrm translation invariance. chiral anomaly inflow reduces equivariant homotopy extend anomaly inflow removed born karman mathbb mathbb infty topological kitaev | non_dup | [] |
73368508 | 10.1007/JHEP11(2016)086 | We calculate all neutral vector two-point functions in Chiral Perturbation
Theory (ChPT) to two-loop order and use these to estimate the ratio of
disconnected to connected contributions as well as contributions involving the
strange quark. We extend the ratio of $-1/10$ derived earlier in two flavour
ChPT at one-loop order to a large part of the higher order contributions and
discuss corrections to it. Our final estimate of the ratio disconnected to
connected is negative and a few % in magnitude.Comment: 16 pages, one reference added, small changes in table 1, version to
be published in JHE | Connected, Disconnected and Strange Quark Contributions to HVP | connected, disconnected and strange quark contributions to hvp | neutral chiral perturbation chpt disconnected involving strange quark. extend flavour chpt disconnected pages | non_dup | [] |
73378274 | 10.1007/JHEP11(2016)087 | We explore an alternative discretization of continuum SU(N_c) Yang-Mills
theory on a Euclidean spacetime lattice, originally introduced by Budzcies and
Zirnbauer. In this discretization the self-interactions of the gauge field are
induced by a path integral over N_b auxiliary boson fields, which are coupled
linearly to the gauge field. The main progress compared to earlier approaches
is that N_b can be as small as N_c. In the present paper we (i) extend the
proof that the continuum limit of the new discretization reproduces Yang-Mills
theory in two dimensions from gauge group U(N_c) to SU(N_c), (ii) derive
refined bounds on N_b for non-integer values, and (iii) perform a perturbative
calculation to match the bare parameter of the induced gauge theory to the
standard lattice coupling. In follow-up papers we will present numerical
evidence in support of the conjecture that the induced gauge theory reproduces
Yang-Mills theory also in three and four dimensions, and explore the
possibility to integrate out the gauge fields to arrive at a dual formulation
of lattice QCD.Comment: 37 pages, 2 figure | Induced QCD I: Theory | induced qcd i: theory | explore discretization continuum mills euclidean spacetime originally budzcies zirnbauer. discretization auxiliary boson linearly field. progress extend continuum discretization reproduces mills derive refined bounds integer perturbative match bare coupling. papers conjecture reproduces mills explore integrate arrive formulation pages | non_dup | [] |
73359395 | 10.1007/JHEP11(2016)088 | In this paper we define, independent of theories, two discriminant matrices
involving a solution to the scattering equations in four dimensions, the ranks
of which are used to divide the solution set into a disjoint union of subsets.
We further demonstrate, {entirely within the Cachazo-He-Yuan formalism,} that
each subset of solutions gives nonzero contribution to tree-level
$\text{N}^{k}\text{MHV}$ gauge/gravity amplitudes only for a specific value of
$k$. Thus the solutions can be characterized by the rank of their discriminant
matrices, which in turn determines the value of $k$ of the $\text{N}^{k}
\text{MHV}$ amplitudes a solution can support. As another application of the
technique developed, we show analytically that in Einstein-Yang-Mills theory,
if all gluons have the same helicity, the tree-level single-trace amplitudes
must vanish.Comment: 26 pages. v2: Introduction expanded, more references and one
discussion section added. v3: an example added in section 5.2, matching
published versio | Characterizing the solutions to scattering equations that support
tree-level $\text{N}^{k}\text{MHV}$ gauge/gravity amplitudes | characterizing the solutions to scattering equations that support tree-level $\text{n}^{k}\text{mhv}$ gauge/gravity amplitudes | discriminant involving ranks divide disjoint union subsets. entirely cachazo yuan formalism nonzero amplitudes discriminant determines amplitudes support. analytically einstein mills gluons helicity trace amplitudes pages. expanded added. matching versio | non_dup | [] |
42714286 | 10.1007/JHEP11(2016)090 | The scale factor duality is a symmetry of dilaton gravity which is known to
lead to pre-big-bang cosmologies. A conformal time version of the scale factor
duality (SFD) was recently implemented as a UV/IR symmetry between decelerated
and accelerated phases of the post-big-bang evolution within Einstein gravity
coupled to a scalar field. The problem investigated in the present paper
concerns the employment of the conformal time SFD methods to the construction
of pre-big-bang and cyclic extensions of these models. We demonstrate that each
big-bang model gives rise to two qualitatively different pre-big-bang
evolutions: a contraction/expansion SFD model and Penrose's Conformal Cyclic
Cosmology (CCC). A few examples of SFD symmetric cyclic universes involving
certain gauged K\"ahler sigma models minimally coupled to Einstein gravity are
studied. We also describe the specific SFD features of the thermodynamics and
the conditions for validity of the generalized second law in the case of
Gauss-Bonnet (GB) extension of these selected CCC models.Comment: v3; 41 pages; Sect.6 extended by discussion of scale factor duality
properties of the adiabatic fluctuations; references added; to appear in JHE | Scale Factor Duality for Conformal Cyclic Cosmologies | scale factor duality for conformal cyclic cosmologies | duality dilaton bang cosmologies. conformal duality implemented decelerated accelerated bang einstein field. concerns employment conformal bang cyclic extensions models. bang qualitatively bang evolutions contraction penrose conformal cyclic cosmology cyclic universes involving gauged ahler sigma minimally einstein studied. thermodynamics validity gauss bonnet pages sect. duality adiabatic | non_dup | [] |
42735450 | 10.1007/JHEP11(2016)091 | We explicitly construct and list all unitary superconformal multiplets, along
with their index contributions, in five and six dimensions. From this data, we
uncover various unifying themes in the representation theory of five- and
six-dimensional superconformal field theories. At the same time, we provide a
detailed argument for the complete classification of unitary irreducible
representations in five dimensions using a combination of physical and
mathematical techniques.Comment: 118 pages; v2 typos corrected and references added ; v3
classification of 5D unitary multiplets corrected and C-type multiplets
removed ; v4 discussion of the procedure for obtaining irreps of the SCA
improved and typos corrected, published versio | Aspects of Superconformal Multiplets in D>4 | aspects of superconformal multiplets in d>4 | explicitly unitary superconformal multiplets dimensions. uncover unifying themes superconformal theories. argument unitary irreducible representations mathematical pages typos corrected unitary multiplets corrected multiplets removed obtaining irreps typos corrected versio | non_dup | [] |
84457270 | 10.1007/JHEP11(2016)092 | We expand upon a claim made in a recent paper [arXiv: 1411.5721] that generic minimally supersymmetric AdS backgrounds of warped flux compactifications of Type II and M theory can be understood as satisfying a straightforward weak integrability condition in the language of E-d(d) x R+ generalised geometry. Namely, they are spaces admitting a generalised G-structure set by the Killing spinor and with constant singlet generalised intrinsic torsion.Foundational Questions Institute (FQXi) FundSilicon Valley Community FoundationDFG/EXC/QUESTEPSRC/EP/K034456/ | Generalised structures for N=1 AdS backgrounds | generalised structures for n=1 ads backgrounds | expand claim generic minimally supersymmetric backgrounds warped compactifications understood satisfying straightforward integrability generalised geometry. admitting generalised killing spinor singlet generalised intrinsic torsion.foundational fqxi fundsilicon valley foundationdfg questepsrc | non_dup | [] |
73364517 | 10.1007/JHEP11(2016)093 | We revisit the transport properties induced by the chiral anomaly in a
charged plasma holographically dual to anomalous $U(1)_V\times U(1)_A$ Maxwell
theory in Schwarzschild-$AdS_5$. Off-shell constitutive relations for vector
and axial currents are derived using various approximations generalising most
of known in the literature anomaly-induced phenomena and revealing some new
ones. In a weak external field approximation, the constitutive relations have
all-order derivatives resummed into six momenta-dependent transport coefficient
functions: the diffusion, the electric/magnetic conductivity, and three anomaly
induced functions. The latter generalise the chiral magnetic and chiral
separation effects. Nonlinear transport is studied assuming presence of
constant background external fields. The chiral magnetic effect, including all
order nonlinearity in magnetic field, is proven to be exact when the magnetic
field is the only external field that is turned on. Non-linear corrections to
the constitutive relations due to electric and axial external fields are
computed.Comment: v1: 42 pages, 10 multi-figures, 3 appendices; v2: minor corrections
introduced and a few refs adde | Anomalous transport from holography: Part I | anomalous transport from holography: part i | revisit chiral anomaly holographically anomalous maxwell schwarzschild constitutive axial currents approximations generalising anomaly phenomena revealing ones. constitutive derivatives resummed momenta conductivity anomaly functions. generalise chiral chiral effects. fields. chiral nonlinearity proven turned constitutive axial pages appendices minor refs adde | non_dup | [] |
42743189 | 10.1007/JHEP11(2016)095 | Using an approach based on Soft Collinear Effective Theory (SCET) and Heavy
Quark Effective Theory (HQET) we determine the $b$-quark fragmentation function
from electron-positron annihilation data at the $Z$-boson peak at
next-to-next-to leading order, with next-to-next-to leading log resummation of
DGLAP logarithms, and next-to-next-to-next-to leading log resummation of
endpoint logarithms. This analysis improves, by one order, the previous
extraction of the $b$-quark fragmentation function. We find that while the
addition of the next order in the calculation does not much shift the extracted
form of the fragmentation function, it does reduce theoretical errors
indicating that the expansion is converging. Using an approach based on
effective field theory allows us to systematically control theoretical errors.
While the fits of theory to data are generally good, the fits seem to be
hinting that higher order correction from HQET may be needed to explain the
$b$-quark fragmentation function at smaller values of momentum fraction.Comment: 62 pages. python code for the DGLAP evolution of the fragmentation
function attache | Effective field theory approach to heavy quark fragmentation | effective field theory approach to heavy quark fragmentation | collinear scet hqet fragmentation positron annihilation boson resummation dglap logarithms resummation endpoint logarithms. improves extraction fragmentation function. fragmentation converging. systematically errors. fits fits seem hinting hqet fragmentation pages. python dglap fragmentation attache | non_dup | [] |
42734804 | 10.1007/JHEP11(2016)097 | The imperfect knowledge of the Higgs boson decay rates and cross sections at
the LHC constitutes a critical systematic uncertainty in the study of the Higgs
boson properties. We show that the full covariance matrix between the Higgs
rates can be determined from the most elementary sources of uncertainty by a
direct application of probability theory. We evaluate the error magnitudes and
full correlation matrix on the set of Higgs cross sections and branching ratios
at $\sqrt{s}=7$, $8$, $13$ and $14$ TeV, which are provided in ancillary files.
The impact of this correlation matrix on the global fits is illustrated with
the latest $7$+$8$ TeV Higgs dataset.Comment: 25 pages, 1 figure. Complete covariance matrix is available in C,
Fortran, Mathematica, PDF, TeX and text formats in ancillary file | The correlation matrix of Higgs rates at the LHC | the correlation matrix of higgs rates at the lhc | imperfect boson constitutes boson properties. covariance elementary theory. magnitudes branching sqrt ancillary files. fits illustrated latest pages figure. covariance fortran mathematica formats ancillary file | non_dup | [] |
73368682 | 10.1007/JHEP11(2016)098 | We present a comprehensive study of the production of top quark pairs in
association with one hard jet in the di-lepton decay channel at the LHC. Our
predictions, accurate at NLO in QCD, focus on the LHC Run II with a
center-of-mass energy of 13 TeV. All resonant and non-resonant contributions at
the perturbative order ${\cal O}(\alpha_s^4 \alpha^4)$ are taken into account,
including irreducible backgrounds to $t\bar{t}j$ production, interferences and
off-shell effects of the top quark and the $W$ gauge boson. We extensively
investigate the dependence of our results upon variation of renormalisation and
factorisation scales and parton distribution functions in the quest for an
accurate estimate of the theoretical uncertainties. Additionally, we explore a
few possibilities for a dynamical scale choice with the goal of stabilizing the
perturbative convergence of the differential cross sections far away from the
$t\bar{t}$ threshold. Results presented here are particularly relevant for
searches of new physics as well as for precise measurements of the top-quark
fiducial cross sections and top-quark properties at the LHC.Comment: 51 pages, 36 figures, 6 tables, version to appear in JHE | Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis
at NLO QCD | off-shell top quarks with one jet at the lhc: a comprehensive analysis at nlo qcd | comprehensive lepton lhc. tev. resonant resonant perturbative alpha alpha irreducible backgrounds interferences boson. extensively renormalisation factorisation parton quest uncertainties. additionally explore possibilities goal stabilizing perturbative away threshold. searches precise fiducial pages tables | non_dup | [] |
73370486 | 10.1007/JHEP11(2016)099 | The large-$N$ limit of ABJM theory is holographically dual to M-theory on
AdS$_4\times S^7/\mathbb{Z}_k$. The 3-sphere partition function has been
obtained via localization, and its leading behavior $F_{\text{ABJM}}^{(0)}\sim
k^{1/2}N^{3/2}$ is exactly reproduced in the dual theory by tree-level
supergravity. We extend this comparison to the sub-leading $\mathcal O(N^0)$
order by computing the one-loop supergravity free energy as a function of $k$
and comparing it with the ABJM result. Curiously, we find that the expressions
do not match, with $F_{\text{SUGRA}}^{(1)}\sim k^6$, while
$F_{\text{ABJM}}^{(1)}\sim k^2$. This suggests that the low-energy
approximation $Z_{\text{M-theory}}=Z_{\text{SUGRA}}$ breaks down at one-loop
order.Comment: 22 pages, 1 figure, discussion on the O(N^{1/2}) order and references
adde | One-loop supergravity on $\mathrm{AdS}_4\times S^7/\mathbb{Z}_k$ and
comparison with ABJM theory | one-loop supergravity on $\mathrm{ads}_4\times s^7/\mathbb{z}_k$ and comparison with abjm theory | abjm holographically mathbb sphere partition localization abjm reproduced supergravity. extend mathcal supergravity abjm result. curiously expressions match sugra abjm sugra breaks pages adde | non_dup | [] |
42737639 | 10.1007/JHEP11(2016)100 | We discuss non-renormalization theorems applying to galileon field theories
and their generalizations. Galileon theories are similar in many respects to
other derivatively coupled effective field theories, including general
relativity and $P(X)$ theories. In particular, these other theories also enjoy
versions of non-renormalization theorems that protect certain operators against
corrections from self-loops. However, we argue that the galileons are
distinguished by the fact that they are not renormalized even by loops of other
heavy fields whose couplings respect the galileon symmetry.Comment: 33 pages. v2: minor corrections, added comments, version to appear in
JHE | Aspects of Galileon Non-Renormalization | aspects of galileon non-renormalization | renormalization theorems galileon generalizations. galileon respects derivatively relativity theories. enjoy versions renormalization theorems protect loops. argue galileons distinguished renormalized loops couplings galileon pages. minor comments | non_dup | [] |
42751782 | 10.1007/JHEP11(2016)101 | Integrable structure has played a very important role in the study of various
non-perturbative aspects of planar ABJM theories. In this paper we showed that
this remarkable structure survive after orbifold operation with discrete group
$\Gamma(\simeq\mathbb{Z}_n)<SU(4)_R\times U(1)_b$. For general $\Gamma$, we
prove the integrability in the scalar sector at the planar two-loop order and
get the Bethe ansatz equations. The eigenvalues of the anomalous dimension
matrix are also obtained. For $\Gamma<SU(4)$, two-loop all-sector and all-loop
BAEs are proposed. Supersymmetric orbifolds are discussed in this framework.Comment: 33 pages, 9 figure | Integrability of Orbifold ABJM Theories | integrability of orbifold abjm theories | integrable played perturbative planar abjm theories. remarkable survive orbifold gamma simeq mathbb gamma integrability planar bethe ansatz equations. eigenvalues anomalous obtained. gamma baes proposed. supersymmetric orbifolds pages | non_dup | [] |
73374930 | 10.1007/JHEP11(2016)102 | Entanglement entropy is a valuable tool for characterizing the correlation
structure of quantum field theories. When applied to gauge theories, subtleties
arise which prevent the factorization of the Hilbert space underlying the
notion of entanglement entropy. Borrowing techniques from extended topological
field theories, we introduce a new definition of entanglement entropy for both
Abelian and non-Abelian gauge theories. Being based on the notion of
excitations, it provides a completely relational way of defining regions.
Therefore, it naturally applies to background independent theories, e.g.
gravity, by circumventing the difficulty of specifying the position of the
entangling surface. We relate our construction to earlier proposals and argue
that it brings these closer to each other. In particular, it yields the
non-Abelian analogue of the "magnetic centre choice", as obtained through an
extended-Hilbert-space method, but applied to the recently introduced fusion
basis for 3D lattice gauge theories. We point out that the different
definitions of entanglement theory can be related to a choice of (squeezed)
vacuum state.Comment: 25 pages + Appendice | On entanglement entropy in non-Abelian lattice gauge theory and 3D
quantum gravity | on entanglement entropy in non-abelian lattice gauge theory and 3d quantum gravity | entanglement valuable characterizing theories. subtleties arise prevent factorization hilbert notion entanglement entropy. borrowing topological entanglement abelian abelian theories. notion excitations relational defining regions. naturally applies e.g. circumventing difficulty specifying entangling surface. relate proposals argue brings closer other. abelian analogue hilbert fusion theories. definitions entanglement squeezed pages appendice | non_dup | [] |
73393321 | 10.1007/JHEP11(2016)103 | New models of the SU(2|1) supersymmetric mechanics based on gauging the
systems with dynamical (1,4,3) and semi-dynamical (4,4,0) supermultiplets are
presented. We propose a new version of SU(2|1) harmonic superspace approach
which makes it possible to construct the Wess-Zumino term for interacting
(4,4,0) multiplets. A new N=4 extension of d=1 Calogero-Moser multiparticle
system is obtained by gauging the U(n) isometry of matrix SU(2|1) harmonic
superfield model.Comment: 0 + 22 pages, reference added, typos correcte | Gauged spinning models with deformed supersymmetry | gauged spinning models with deformed supersymmetry | supersymmetric mechanics gauging supermultiplets presented. propose harmonic superspace wess zumino interacting multiplets. calogero moser multiparticle gauging isometry harmonic superfield pages typos correcte | non_dup | [] |
73392504 | 10.1007/JHEP11(2016)104 | We analytically compute the two-loop scattering amplitude $gg \to Hg$
assuming that the mass of the quark, that mediates the ggH interaction, is
vanishingly small. Our computation provides an important ingredient required to
improve the theoretical description of the top-bottom interference effect in
Higgs boson production in gluon fusion, and to elucidate its impact on the
Higgs boson transverse momentum distribution.Comment: 29 pages, 4 figures, analytical results attached as ancillary files,
v2 minor typos corrected, published on JHE | Two-loop $gg \to Hg$ amplitude mediated by a nearly massless quark | two-loop $gg \to hg$ amplitude mediated by a nearly massless quark | analytically mediates vanishingly small. ingredient interference boson gluon fusion elucidate boson pages attached ancillary files minor typos corrected | non_dup | [] |
73351822 | 10.1007/JHEP11(2016)105 | We perform a systematic one-loop renormalization of a general renormalizable
Yang-Mills theory coupled to scalars and fermions using a regularization scheme
with a smooth momentum cutoff $\Lambda$ (implemented through an exponential
damping factor). We construct the necessary finite counterterms restoring the
BRST invariance of the effective action by analyzing the relevant
Slavnov-Taylor identities. We find the relation between the renormalized
parameters in our scheme and in the conventional $\overline{\rm MS}$ scheme
which allow us to obtain the explicit two-loop renormalization group equations
in our scheme from the known two-loop ones in the $\overline{\rm MS}$ scheme.
We calculate in our scheme the divergences of two-loop vacuum graphs in the
presence of a constant scalar background field which allow us to rederive the
two-loop beta functions for parameters of the scalar potential. We also prove
that consistent application of the proposed regularization leads to
counterterms which, together with the original action, combine to a bare action
expressed in terms of bare parameters. This, together with treating $\Lambda$
as an intrinsic scale of a hypothetical underlying finite theory of all
interactions, offers a possibility of an unconventional solution to the
hierarchy problem if no intermediate scales between the electroweak scale and
the Planck scale exist.Comment: updated references, 90 pages, many figure | Two-loop RGE of a general renormalizable Yang-Mills theory in a
renormalization scheme with an explicit UV cutoff | two-loop rge of a general renormalizable yang-mills theory in a renormalization scheme with an explicit uv cutoff | renormalization renormalizable mills scalars fermions regularization cutoff lambda implemented exponential damping counterterms restoring brst invariance analyzing slavnov taylor identities. renormalized overline renormalization overline scheme. divergences rederive beta potential. regularization counterterms combine bare bare parameters. treating lambda intrinsic hypothetical offers unconventional hierarchy electroweak planck updated pages | non_dup | [] |
42743906 | 10.1007/JHEP11(2016)106 | We conjecture a formula for the Schur index of N=2 four-dimensional theories
in the presence of boundary conditions and/or line defects, in terms of the
low-energy effective Seiberg-Witten description of the system together with
massive BPS excitations. We test our proposal in a variety of examples for
SU(2) gauge theories, either conformal or asymptotically free. We use the
conjecture to compute these defect-enriched Schur indices for theories which
lack a Lagrangian description, such as Argyres-Douglas theories. We demonstrate
in various examples that line defect indices can be expressed as sums of
characters of the associated two-dimensional chiral algebra and that for
Argyres-Douglas theories the line defect OPE reduces in the index to the
Verlinde algebra.Comment: 63 pages + appendices, 15 figures. v2 published version, references
added, representations of SO(8) Kac-Moody discusse | Infrared Computations of Defect Schur Indices | infrared computations of defect schur indices | conjecture schur defects seiberg witten massive excitations. proposal conformal asymptotically free. conjecture defect enriched schur indices lagrangian argyres douglas theories. defect indices sums characters chiral argyres douglas defect reduces verlinde pages appendices figures. representations moody discusse | non_dup | [] |
42747174 | 10.1007/JHEP11(2016)107 | We assess how different ATLAS and CMS searches for supersymmetry in the
$t\bar t + E_T^{\rm miss}$ final state at Run 1 of the LHC constrain scenarios
with a fermionic top partner and a dark matter candidate. We find that the
efficiencies of these searches in all-hadronic, 1-lepton and 2-lepton channels
are quite similar for scalar and fermionic top partners. Therefore, in general,
efficiency maps for stop-neutralino simplified models can also be applied to
fermionic top-partner models, provided the narrow width approximation holds in
the latter. Owing to the much higher production cross-sections of heavy top
quarks as compared to stops, masses up to $m_T\approx 850$ GeV can be excluded
from the Run 1 stop searches. Since the simplified-model results published by
ATLAS and CMS do not extend to such high masses, we provide our own efficiency
maps obtained with CheckMATE and MadAnalysis 5 for these searches. Finally, we
also discuss how generic gluino/squark searches in multi-jet final states
constrain heavy top partner production.Comment: 39 pages, 8 figures, 17 tables. Version accepted by JHEP. Efficiency
maps derived for this paper can be downloaded from
http://lpsc.in2p3.fr/projects-th/recasting/susy-vs-vlq/ttbarME | Scalar versus fermionic top partner interpretations of $t\bar t +
E_T^{\rm miss}$ searches at the LHC | scalar versus fermionic top partner interpretations of $t\bar t + e_t^{\rm miss}$ searches at the lhc | atlas searches supersymmetry miss constrain scenarios fermionic partner candidate. efficiencies searches hadronic lepton lepton fermionic partners. stop neutralino simplified fermionic partner narrow latter. owing quarks stops approx excluded stop searches. simplified atlas extend checkmate madanalysis searches. generic gluino squark searches constrain partner pages tables. jhep. downloaded recasting susy ttbarme | non_dup | [] |
73377193 | 10.1007/JHEP11(2016)108 | We present the Renormalization Group improvement of the Twin Higgs effective
potential at cubic order in logarithmic accuracy. We first introduce a
model-independent low-energy effective Lagrangian that captures both the
pseudo-Nambu-Goldstone boson nature of the Higgs field and the twin light
degrees of freedom charged under a copy of the Standard Model. We then apply
the background field method to systematically re-sum all the one loop diagrams
contributing to the potential. We show how this technique can be efficient to
implicitly renormalize the higher-dimensional operators in the twin sector
without classifying all of them. A prediction for the Higgs mass in the Twin
Higgs model is derived and found to be of the order of $M_H \sim 120
~\text{GeV}$ with an ultraviolet cut-off $m_*\sim 10-20 ~\text{TeV}$.
Irrespective of any possible ultraviolet completion of the low-energy
Lagrangian, the infrared degrees of freedom alone are therefore enough to
account for the observed value of the Higgs mass through running effects.Comment: 28 pages, 6 figure | The RG-improved Twin Higgs effective potential at NNLL | the rg-improved twin higgs effective potential at nnll | renormalization twin cubic logarithmic accuracy. lagrangian captures pseudo nambu goldstone boson twin freedom copy model. systematically diagrams contributing potential. implicitly renormalize twin classifying them. twin ultraviolet irrespective ultraviolet completion lagrangian infrared freedom running pages | non_dup | [] |
73359128 | 10.1007/JHEP11(2016)109 | We show that different (brane and constrained superfield) descriptions for
the Volkov-Akulov goldstino coupled to N=1, D=4 supergravity with matter
produce similar wide classes of models with spontaneously broken local
supersymmetry and discuss the relation between the different formulations. As
with the formulations with irreducible constrained superfields, the geometric
goldstino brane approach has the advantage of being manifestly off-shell
supersymmetric without the need to introduce auxiliary fields. It provides an
explicit solution of the nilpotent superfield constraints and avoids issues
with non-Gaussian integration of auxiliary fields. We describe general
couplings of the supersymmetry breaking sector, including the goldstino and
other non-supersymmetric matter, to supergravity and matter supermultiplets.
Among various examples, we discuss a goldstino brane contribution to the
gravitino mass term and the supersymmetrization of the anti-D3-brane
contribution to the effective theory of type IIB warped flux compactifications.Comment: Dedicated to the memory of Mario Tonin, 47 pages; v2,v3: comments and
references added, typos correcte | The Goldstino Brane, the Constrained Superfields and Matter in N=1
Supergravity | the goldstino brane, the constrained superfields and matter in n=1 supergravity | brane constrained superfield descriptions volkov akulov goldstino supergravity spontaneously broken supersymmetry formulations. formulations irreducible constrained superfields geometric goldstino brane advantage manifestly supersymmetric auxiliary fields. nilpotent superfield avoids auxiliary fields. couplings supersymmetry breaking goldstino supersymmetric supergravity supermultiplets. goldstino brane gravitino supersymmetrization brane warped dedicated mario tonin pages comments typos correcte | non_dup | [] |
42647042 | 10.1007/JHEP11(2016)115 | We clarify a Wess-Zumino-Wtten-like structure including Ramond fields and
propose one systematic way to construct gauge invariant actions:
Wess-Zumino-Witten-like complete action $S_{\rm WZW}$. We show that
Kunitomo-Okawa's action proposed in arXiv:1508.00366 can obtain a topological
parameter dependence of Ramond fields and belongs to our WZW-like framework. In
this framework, once a WZW-like functional $\mathcal{A}_{\eta } =
\mathcal{A}_{\eta } [\Psi ]$ of a dynamical string field $\Psi $ is
constructed, we obtain one realization of $S_{\rm WZW}$ parametrized by $\Psi
$. On the basis of this way, we construct an action $\widetilde{S}$ whose
on-shell condition is equivalent to the Ramond equations of motion proposed in
arXiv:1506.05774. Using these results, we provide the equivalence of two these
theories: arXiv:1508.00366 and arXiv:1506.05774.Comment: 25+5 pages; Published ve | Comments on complete actions for open superstring field theory | comments on complete actions for open superstring field theory | clarify wess zumino wtten ramond propose wess zumino witten kunitomo okawa topological ramond belongs framework. mathcal mathcal realization parametrized widetilde ramond equivalence pages | non_dup | [] |
73387691 | 10.1007/JHEP11(2016)116 | We evaluate one-interval R\'enyi entropy and entanglement entropy for the
excited states of two-dimensional conformal field theory (CFT) on a cylinder,
and examine their differences from the ones for the thermal state. We assume
the interval to be short so that we can use operator product expansion (OPE) of
twist operators to calculate R\'enyi entropy in terms of sum of one-point
functions of OPE blocks. We find that the entanglement entropy for highly
excited state and thermal state behave the same way after appropriate
identification of the conformal weight of the state with the temperature.
However, there exists no such universal identification for the R\'enyi entropy
in the short-interval expansion. Therefore, the highly excited state does not
look thermal when comparing its R\'enyi entropy to the thermal state one. As
the R\'enyi entropy captures the higher moments of the reduced density matrix
but the entanglement entropy only the average, our results imply that the
emergence of thermality depends on how refined we look into the entanglement
structure of the underlying pure excited state.Comment: 16 pages, 1 figure; V2, 17 pages, 2 figures, published versio | Thermality and excited state R\'enyi entropy in two-dimensional CFT | thermality and excited state r\'enyi entropy in two-dimensional cft | enyi entanglement excited conformal cylinder examine state. twist enyi blocks. entanglement excited behave conformal temperature. universal enyi expansion. excited look enyi one. enyi captures moments entanglement imply emergence thermality refined look entanglement excited pages pages versio | non_dup | [] |
73380305 | 10.1007/JHEP11(2016)117 | We consider scattering in quantum gravity and derive long-range classical and
quantum contributions to the scattering of light-like bosons and fermions
(spin-0, spin-1/2, spin-1) from an external massive scalar field, such as the
Sun or a black hole. This is achieved by treating general relativity as an
effective field theory and identifying the non-analytic pieces of the one-loop
gravitational scattering amplitude. It is emphasized throughout the paper how
modern amplitude techniques, involving spinor-helicity variables, unitarity,
and squaring relations in gravity enable much simplified computations. We
directly verify, as predicted by general relativity, that all classical effects
in our computation are universal (in the context of matter type and
statistics). Using an eikonal procedure we confirm the post-Newtonian general
relativity correction for light-like bending around large stellar objects. We
also comment on treating effects from quantum hbar dependent terms using the
same eikonal method.Comment: latex 31 pages. 5 feynmp figures. v2: Clarifications on conventions
and notations. Minors changes and latex format update. v3: A sign mistake
corrected and various typos correcte | Light-like Scattering in Quantum Gravity | light-like scattering in quantum gravity | derive bosons fermions massive hole. treating relativity identifying analytic pieces gravitational amplitude. emphasized modern involving spinor helicity unitarity squaring enable simplified computations. verify relativity universal eikonal confirm newtonian relativity bending objects. comment treating hbar eikonal latex pages. feynmp figures. clarifications conventions notations. minors latex format update. mistake corrected typos correcte | non_dup | [] |
42732075 | 10.1007/JHEP11(2016)118 | Many theories of modified gravity with higher order derivatives are usually
ignored because of serious problems that appear due to an additional ghost
degree of freedom. Most dangerously, it causes an immediate decay of the
vacuum. However, breaking Lorentz invariance can cure such abominable behavior.
By analyzing a model that describes a massive graviton together with a
remaining Boulware-Deser ghost mode we show that even ghostly theories of
modified gravity can yield models that are viable at both classical and quantum
levels and, therefore, they should not generally be ruled out. Furthermore, we
identify the most dangerous quantum scattering process that has the main impact
on the decay time and find differences to simple theories that only describe an
ordinary scalar field and a ghost. Additionally, constraints on the parameters
of the theory including some upper bounds on the Lorentz-breaking cutoff scale
are presented. In particular, for a simple theory of massive gravity we find
that a breaking of Lorentz invariance is allowed to happen even at scales above
the Planck mass. Finally, we discuss the relevance to other theories of
modified gravity.Comment: 18 pages, 3 figures, version published in JHE | A spectre is haunting the cosmos: Quantum stability of massive gravity
with ghosts | a spectre is haunting the cosmos: quantum stability of massive gravity with ghosts | derivatives ignored serious ghost freedom. dangerously immediate vacuum. breaking lorentz invariance cure abominable behavior. analyzing describes massive graviton boulware deser ghost ghostly viable ruled out. dangerous ordinary ghost. additionally bounds lorentz breaking cutoff presented. massive breaking lorentz invariance happen planck mass. relevance pages | non_dup | [] |
73360532 | 10.1007/JHEP11(2016)120 | We discuss relations between quantum BPS invariants defined in terms of a
product decomposition of certain series, and difference equations (quantum
A-polynomials) that annihilate such series. We construct combinatorial models
whose structure is encoded in the form of such difference equations, and whose
generating functions (Hilbert-Poincar\'e series) are solutions to those
equations and reproduce generating series that encode BPS invariants.
Furthermore, BPS invariants in question are expressed in terms of Lyndon words
in an appropriate language, thereby relating counting of BPS states to the
branch of mathematics referred to as combinatorics on words. We illustrate
these results in the framework of colored extremal knot polynomials: among
others we determine dual quantum extremal A-polynomials for various knots,
present associated combinatorial models, find corresponding BPS invariants
(extremal Labastida-Mari\~no-Ooguri-Vafa invariants) and discuss their
integrality.Comment: 41 pages, 1 figure, a supplementary Mathematica file attache | BPS counting for knots and combinatorics on words | bps counting for knots and combinatorics on words | invariants decomposition polynomials annihilate series. combinatorial encoded generating hilbert poincar reproduce generating encode invariants. invariants lyndon thereby relating counting branch mathematics referred combinatorics words. illustrate colored extremal knot polynomials extremal polynomials knots combinatorial invariants extremal labastida mari ooguri vafa invariants pages supplementary mathematica file attache | non_dup | [] |
73381625 | 10.1007/JHEP11(2016)121 | We compute the vacuum expectation values of $1/6$ supersymmetric Wilson loops
in higher dimensional representations of the gauge group in ABJM theory. We
present results for the $m$-symmetric and $m$-antisymmetric representations by
exploiting standard matrix model techniques. At leading order, in the saddle
point approximation, our expressions reproduce holographic results from both D6
and D2 branes corresponding to the antisymmetric and symmetric representations,
respectively. We also compute 1/N corrections to the leading saddle point
results.Comment: 17 pages, 5 figure | Higher Rank ABJM Wilson Loops from Matrix Models | higher rank abjm wilson loops from matrix models | expectation supersymmetric wilson loops representations abjm theory. antisymmetric representations exploiting techniques. saddle expressions reproduce holographic branes antisymmetric representations respectively. saddle pages | non_dup | [] |
42747276 | 10.1007/JHEP11(2016)122 | Assuming that there is a sterile neutrino, we ask what then is the ability of
long-baseline experiments to i) establish that neutrino oscillation violates
CP, ii) determine the three-neutrino mass ordering, and iii) determine which
CP-violating phase or phases are the cause of any CP violation that may be
observed. We find that the ability to establish CP violation and to determine
the mass ordering could be very substantial. However, the effects of the
sterile neutrino could be quite large, and it might prove very difficult to
determine which phase is responsible for an observed CP violation. We explain
why a sterile neutrino changes the long-baseline sensitivities to CP violation
and to the mass ordering in the ways that it does. We note that long-baseline
experiments can probe the presence of sterile neutrinos in a way that is
different from, and complementary to, the probes of short-baseline experiments.
We explore the question of how large sterile-active mixing angles need to be
before long-baseline experiments can detect their effects, or how small they
need to be before the interpretation of these experiments can safely disregard
the possible existence of sterile neutrinos.Comment: Published in JHEP, 24 pages, 12 figures, IH results adde | Capabilities of long-baseline experiments in the presence of a sterile
neutrino | capabilities of long-baseline experiments in the presence of a sterile neutrino | sterile establish oscillation violates ordering violating violation observed. establish violation ordering substantial. sterile violation. sterile sensitivities violation ordering ways does. sterile neutrinos complementary probes experiments. explore sterile angles detect safely disregard sterile jhep pages adde | non_dup | [] |
73370975 | 10.1007/JHEP11(2016)123 | We study $\alpha'$-corrections in multiple D7-brane configurations with
non-commuting profiles for their transverse position fields. We focus on
T-brane systems, crucial in F-theory GUT model building. There
$\alpha'$-corrections modify the D-term piece of the BPS equations which,
already at leading order, require a non-primitive Abelian worldvolume flux
background. We find that $\alpha'$-corrections may either i) leave this flux
background invariant, ii) modify the Abelian non-primitive flux profile, or
iii) deform it to a non-Abelian profile. The last case typically occurs when
primitive fluxes, a necessary ingredient to build 4d chiral models, are added
to the system. We illustrate these three cases by solving the
$\alpha'$-corrected D-term equations in explicit examples, and describe their
appearance in more general T-brane backgrounds. Finally, we discuss
implications of our findings for F-theory GUT local models.Comment: 42 page | T-branes and $\alpha'$-corrections | t-branes and $\alpha'$-corrections | alpha brane configurations commuting fields. brane crucial building. alpha modify piece primitive abelian worldvolume background. alpha leave modify abelian primitive deform abelian profile. primitive fluxes ingredient build chiral system. illustrate solving alpha corrected appearance brane backgrounds. | non_dup | [] |
73352401 | 10.1007/JHEP11(2016)124 | We study the production of scalar leptoquarks at IceCube, in particular, a
particle transforming as a triplet under the weak interaction. The existence of
electroweak-triplet scalars is highly motivated by models of grand unification
and also within radiative seesaw models for neutrino mass generation. In our
framework, we extend the Standard Model by a single colored electroweak-triplet
scalar leptoquark and analyze its implications on the excess of ultra-high
energy neutrino events observed by the IceCube collaboration. We consider only
couplings between the leptoquark to first generation leptons and quarks and
carry out a statistical analysis to determine the parameters that best describe
the IceCube data as well as set $95\%$ CL upper bounds. We analyze whether this
study is still consistent with most up-to-date LHC data and various low energy
observables.Comment: 30 pages, 12 figures, Updated LHC constraints; Figure 9 modified
consistently. Added comment on interference effect | Implications of a Electroweak Triplet Scalar Leptoquark on the
Ultra-High Energy Neutrino Events at IceCube | implications of a electroweak triplet scalar leptoquark on the ultra-high energy neutrino events at icecube | leptoquarks icecube transforming triplet interaction. electroweak triplet scalars motivated grand unification radiative seesaw generation. extend colored electroweak triplet leptoquark analyze excess ultra icecube collaboration. couplings leptoquark leptons quarks carry icecube bounds. analyze pages updated consistently. comment interference | non_dup | [] |
42693638 | 10.1007/JHEP11(2016)126 | We propose a stringy construction giving rise to a class of interacting and
non-supersymmetric CFT's in six dimensions. Such theories may be obtained as an
IR conformal fixed point of an RG flow ending up in a $(1, 0)$ theory in the
UV. We provide the due holographic evidence in the context of massive type IIA
on $\textrm {AdS}_{7}\times M_3$, where $M_3$ is topologically an $S^3$. In
particular, in this paper we present a 10d flow solution which may be
interpreted as a non-BPS bound state of NS5, D6 and $\overline{\textrm{D6}}$
branes. Moreover, by adopting its 7d effective description, we are able to
holographically compute the free energy and the operator spectrum in the novel
IR conformal fixed point.Comment: 33 pages + appendices, 6 figures and 5 tables; v2: discussions on the
SUSY breaking flow (sec. 2.3) and perturbative/non-perturbative stability
(sec. 5) improved, figure added, references added, minor corrections, typos
corrected, published versio | A new 6d fixed point from holography | a new 6d fixed point from holography | propose stringy giving interacting supersymmetric dimensions. conformal ending holographic massive textrm topologically interpreted overline textrm branes. adopting holographically conformal pages appendices tables discussions susy breaking sec. perturbative perturbative sec. minor typos corrected versio | non_dup | [] |
73360062 | 10.1007/JHEP11(2016)127 | In this paper, we study the holographic models of s-wave and p-wave
Josephoson junction away from probe limit in (3+1)-dimensional spacetime,
respectively. With the backreaction of the matter, we obtained the anisotropic
black hole solution with the condensation of matter fields. We observe that the
critical temperature of Josephoson junction decreases with increasing
backreaction. In addition to this, the tunneling current and condenstion of
Josephoson junction become smaller as backreaction grows larger, but the
relationship between current and phase difference still holds for sine
function. Moreover, condenstion of Josephoson junction deceases with increasing
width of junction exponentially.Comment: 22 pages, 12 figures, v2: typos corrected, contents improved,
published versio | Holographic s-wave and p-wave Josephson junction with backreaction | holographic s-wave and p-wave josephson junction with backreaction | holographic josephoson junction away spacetime respectively. backreaction anisotropic condensation fields. josephoson junction backreaction. tunneling condenstion josephoson junction backreaction grows sine function. condenstion josephoson junction deceases junction pages typos corrected contents versio | non_dup | [] |
42743381 | 10.1007/JHEP11(2016)128 | We present a new black hole solution in the asymptotic Lifshitz spacetime
with a hyperscaling violating factor. A novel computational method is
introduced to compute the DC thermoelectric conductivities analytically. We
find that both the linear-T and quadratic-T contributions to the resistivity
can be realized, indicating that a more detailed comparison with experimental
phenomenology can be performed in this scenario.Comment: 1+26 pages, 2 figures, major revision; perturbation of the auxiliary
field considered; a new method was developed to compute the dc
conductivities; published in JHE | Linear and quadratic in temperature resistivity from holography | linear and quadratic in temperature resistivity from holography | asymptotic lifshitz spacetime hyperscaling violating factor. thermoelectric conductivities analytically. quadratic resistivity realized phenomenology pages revision perturbation auxiliary conductivities | non_dup | [] |
73370405 | 10.1007/JHEP11(2016)129 | The volume of the region inside the bulk Ryu-Takayanagi surface is a
codimension-one object, and a natural generalization of holographic complexity
to the case of subregions in the boundary QFT. We focus on time-independent
geometries, and study the properties of this volume in various circumstances.
We derive a formula for computing the volume for a strip entangling surface and
a general asymptotically AdS bulk geometry. For an AdS black hole geometry, the
volume exhibits non-monotonic behaviour as a function of the size of the
entangling region (unlike the behaviour of the entanglement entropy in this
setup, which is monotonic). For setups in which the holographic entanglement
entropy exhibits transitions in the bulk, such as global AdS black hole,
geometries dual to confining theories and disjoint entangling surfaces, the
corresponding volume exhibits a discontinuous finite jump at the transition
point (and so do the volumes of the corresponding entanglement wedges). We
compute this volume discontinuity in several examples. Lastly, we compute the
codim-zero volume and the bulk action of the entanglement wedge for the case of
a sphere entangling surface and pure AdS geometry.Comment: 25 page | On Volumes of Subregions in Holography and Complexity | on volumes of subregions in holography and complexity | takayanagi codimension generalization holographic subregions qft. geometries circumstances. derive strip entangling asymptotically geometry. exhibits monotonic entangling unlike entanglement setup monotonic setups holographic entanglement exhibits geometries confining disjoint entangling exhibits discontinuous jump volumes entanglement wedges discontinuity examples. lastly codim entanglement wedge sphere entangling | non_dup | [] |
42753025 | 10.1007/JHEP11(2016)131 | We revisit the old black hole S-Matrix construction and its new partial wave
expansion of 't Hooft. Inspired by old ideas from non-critical string theory \&
$c=1$ Matrix Quantum Mechanics, we reformulate the scattering in terms of a
quantum mechanical model\textemdash of waves scattering off inverted harmonic
oscillator potentials\textemdash that exactly reproduces the unitary black hole
S-Matrix for all spherical harmonics; each partial wave corresponds to an
inverted harmonic oscillator with ground state energy that is shifted relative
to the s-wave oscillator. Identifying a connection to 2d string theory allows
us to show that there is an exponential degeneracy in how a given total initial
energy may be distributed among many partial waves of the 4d black hole.Comment: 31 pages. Acknowledgements added. Published in JHE | The Black Hole S-Matrix from Quantum Mechanics | the black hole s-matrix from quantum mechanics | revisit hooft. inspired ideas mechanics reformulate textemdash inverted harmonic oscillator potentials textemdash reproduces unitary spherical harmonics inverted harmonic oscillator shifted oscillator. identifying connection exponential degeneracy pages. acknowledgements added. | non_dup | [] |
73369655 | 10.1007/JHEP11(2016)132 | We study the thermodynamics of flavor D7-branes embedded in an anisotropic
black brane solution of type IIB supergravity. The flavor branes undergo a
phase transition between a `Minkowski embedding', in which they lie outside of
the horizon, and a `black hole embedding', in which they fall into the horizon.
This transition depends on the black hole temperature, its degree of
anisotropy, and the mass of the flavor degrees of freedom. It happens either at
a critical temperature or at a critical anisotropy. A general lesson we learn
from this analysis is that the anisotropy, in this particular realization,
induces similar effects as the temperature. In particular, increasing the
anisotropy bends the branes more and more into the horizon. Moreover, we
observe that the transition becomes smoother for higher anisotropies.Comment: 24 pages, 16 figures; v2: 25 pages, discussion of chiral condensate
improved, minor changes, references adde | Thermodynamics of anisotropic branes | thermodynamics of anisotropic branes | thermodynamics flavor branes embedded anisotropic brane supergravity. flavor branes undergo minkowski embedding horizon embedding fall horizon. anisotropy flavor freedom. happens anisotropy. lesson learn anisotropy realization induces temperature. anisotropy bends branes horizon. smoother pages pages chiral condensate minor adde | non_dup | [] |
73383407 | 10.1007/JHEP11(2016)133 | In this paper we construct a new Type IIB background with an $AdS_4$ factor
that preserves ${\cal N}=4$ Supersymmetry. This solution is obtained using a
non-Abelian T-duality transformation on the Type IIA reduction of the
$AdS_4\times S^7$ background. We interpret our configuration as a patch of a
more general background with localised sources, dual to the renormalisation
fixed point of a $T_{\rho}^{\hat{\rho}} (SU(N))$ quiver field theory. This
relates explicitly the $AdS_4$ geometry to a D3-D5-NS5 brane intersection,
illuminating what seems to be a more general phenomenon, relating $AdS_{p+1}$
backgrounds generated by non-Abelian T-duality to Dp-D(p+2)-NS5 branes
intersections.Comment: 36 pages, various figures. Minor changes, to match the version to be
published in JHE | Three-dimensional N=4 Linear Quivers and non-Abelian T-duals | three-dimensional n=4 linear quivers and non-abelian t-duals | preserves supersymmetry. abelian duality background. interpret patch localised renormalisation quiver theory. relates explicitly brane intersection illuminating phenomenon relating backgrounds abelian duality branes pages figures. minor match | non_dup | [] |
42678696 | 10.1007/JHEP11(2016)135 | We classify possible supersymmetry-preserving relevant, marginal, and
irrelevant deformations of unitary superconformal theories in $d \geq 3$
dimensions. Our method only relies on symmetries and unitarity. Hence, the
results are model independent and do not require a Lagrangian description. Two
unifying themes emerge: first, many theories admit deformations that reside in
multiplets together with conserved currents. Such deformations can lead to
modifications of the supersymmetry algebra by central and non-central charges.
Second, many theories with a sufficient amount of supersymmetry do not admit
relevant or marginal deformations, and some admit neither. The classification
is complicated by the fact that short superconformal multiplets display a rich
variety of sporadic phenomena, including supersymmetric deformations that
reside in the middle of a multiplet. We illustrate our results with examples in
diverse dimensions. In particular, we explain how the classification of
irrelevant supersymmetric deformations can be used to derive known and new
constraints on moduli-space effective actions.Comment: 73 pages, 34 table | Deformations of Superconformal Theories | deformations of superconformal theories | classify supersymmetry preserving marginal irrelevant deformations unitary superconformal dimensions. relies symmetries unitarity. lagrangian description. unifying themes emerge admit deformations reside multiplets conserved currents. deformations modifications supersymmetry charges. supersymmetry admit marginal deformations admit neither. complicated superconformal multiplets display sporadic phenomena supersymmetric deformations reside multiplet. illustrate diverse dimensions. irrelevant supersymmetric deformations derive moduli pages | non_dup | [] |
42705839 | 10.1007/JHEP11(2016)136 | We study on-shell diagrams for gravity theories with any number of
supersymmetries and find a compact Grassmannian formula in terms of edge
variables of the graphs. Unlike in gauge theory where the analogous form
involves only $\dlog$-factors, in gravity there is a non-trivial numerator as
well as higher degree poles in the edge variables. Based on the structure of
the Grassmannian formula for $\N=8$ supergravity we conjecture that gravity
loop amplitudes also possess similar properties. In particular, we find that
there are only logarithmic singularities on cuts with finite loop momentum,
poles at infinity are present and loop amplitudes show special behavior on
certain collinear cuts. We demonstrate on 1-loop and 2-loop examples that the
behavior on collinear cuts is a highly non-trivial property which requires
cancellations between all terms contributing to the amplitude.Comment: 45 pages, 37 figure | Gravity On-shell Diagrams | gravity on-shell diagrams | diagrams supersymmetries grassmannian graphs. unlike analogous involves dlog trivial numerator poles variables. grassmannian supergravity conjecture amplitudes possess properties. logarithmic singularities cuts poles infinity amplitudes collinear cuts. collinear cuts trivial cancellations contributing pages | non_dup | [] |
42738106 | 10.1007/JHEP11(2016)137 | We examine the onset of superfluid instabilities for geometries that exhibit
hyperscaling violation and Lifshitz-like scaling at infrared and intermediate
energy scales, and approach AdS in the ultraviolet. In particular, we are
interested in the role of a non-trivial coupling between the neutral scalar
supporting the scaling regime, and the (charged) complex scalar which
condenses. The analysis focuses exclusively on unstable modes arising from the
hyperscaling-violating portion of the geometry. Working at zero temperature, we
identify simple analytical criteria for the presence of scalar instabilities,
and discuss under which conditions a minimal charge will be needed to trigger a
transition. Finite temperature examples are constructed numerically for a few
illustrative cases.Comment: 41 pages, 7 figure | Criteria For Superfluid Instabilities of Geometries with Hyperscaling
Violation | criteria for superfluid instabilities of geometries with hyperscaling violation | examine onset superfluid instabilities geometries exhibit hyperscaling violation lifshitz infrared ultraviolet. interested trivial neutral supporting condenses. focuses exclusively unstable arising hyperscaling violating portion geometry. instabilities trigger transition. numerically illustrative pages | non_dup | [] |
42752213 | 10.1007/JHEP11(2016)139 | We extend our prescription for the construction of a covariant and
background-independent effective action for scalar quantum field theories to
the case where momentum modes below a certain scale are suppressed by the
presence of an infrared regulator. The key step is an appropriate choice of the
infrared cutoff for which the Ward identity, capturing the information from
single-field dependence of the ultraviolet action, continues to be exactly
solvable, and therefore, in addition to covariance, manifest background
independence of the effective action is guaranteed at any scale. A practical
consequence is that in this framework one can adopt truncations dependent on
the single total field. Furthermore we discuss the necessary and sufficient
conditions for the preservation of symmetries along the renormalization group
flow.Comment: 20 pages, latex, revised version, accepted for pub. on JHE | Covariant and background independent functional RG flow for the
effective average action | covariant and background independent functional rg flow for the effective average action | extend prescription covariant suppressed infrared regulator. infrared cutoff ward capturing ultraviolet continues solvable covariance manifest independence guaranteed scale. practical adopt truncations field. preservation symmetries renormalization pages latex revised pub. | non_dup | [] |
42689743 | 10.1007/JHEP11(2016)141 | Even though the Standard Model (SM) is weakly coupled at the Fermi scale, a
new strong dynamics involving its degrees of freedom may conceivably lurk at
slightly higher energies, in the multi TeV range. Approximate symmetries
provide a structurally robust context where, within the low energy description,
the dimensionless SM couplings are weak, while the new strong dynamics
manifests itself exclusively through higher-derivative interactions. We present
an exhaustive classification of such scenarios in the form of effective field
theories, paying special attention to new classes of models where the strong
dynamics involves, along with the Higgs boson, the SM gauge bosons and/or the
fermions. The IR softness of the new dynamics suppresses its effects at LEP
energies, but deviations are in principle detectable at the LHC, even at
energies below the threshold for production of new states. Our construction
provides the so far unique structurally robust context where to motivate
several searches in Higgs physics, diboson production, or WW scattering, which
were so far poorly justified. Perhaps surprisingly, the interplay between weak
coupling, strong coupling and derivatives, which is controlled by symmetries,
can override the naive expansion in operator dimension, providing instances
where dimension-8 dominates dimension-6, well within the domain of validity of
the low energy effective theory. This result reveals the limitations of an
analysis that is both ambitiously general and restricted to dimension-6
operators.Comment: 37 pages, 1 figur | Patterns of Strong Coupling for LHC Searches | patterns of strong coupling for lhc searches | weakly fermi involving freedom conceivably lurk range. approximate symmetries structurally robust dimensionless couplings manifests exclusively interactions. exhaustive scenarios paying involves boson bosons fermions. softness suppresses deviations detectable states. structurally robust motivate searches diboson poorly justified. perhaps surprisingly interplay derivatives symmetries override naive instances dominates validity theory. reveals limitations ambitiously restricted pages figur | non_dup | [] |
73388022 | 10.1007/JHEP11(2016)142 | The computation of the correlation numbers in Minimal Liouville Gravity
involves an integration over moduli spaces of complex curves. There are two
independent approaches to the calculation: the direct one, based on the CFT
methods and Liouville higher equations of motion, and the alternative one,
motivated by discrete description of 2D gravity and based on the Douglas string
equation. However these two approaches give rise to the results that are not
always consistent among themselves. In this paper we explore this problem. We
show that in order to reconcile two methods the so-called discrete terms in the
operator product expansion in the underlying Liouville theory must be properly
taken into account. In this way we propose modified version of the expression
for four-point correlation number and find full agreement between direct and
alternative approaches. Our result allows to consider correlators without any
restrictions on the number of conformal blocks contributing to the matter
sector correlation function | On the construction of the correlation numbers in Minimal Liouville
Gravity | on the construction of the correlation numbers in minimal liouville gravity | liouville involves moduli curves. liouville motivated douglas equation. themselves. explore problem. reconcile liouville properly account. propose approaches. correlators restrictions conformal blocks contributing | non_dup | [] |
73353850 | 10.1007/JHEP11(2016)143 | We propose a connected prescription formula in twistor space for all
tree-level form factors of the stress tensor multiplet operator in
$\mathcal{N}=4$ super Yang-Mills, which is a generalisation of the expression
of Roiban, Spradlin and Volovich for superamplitudes. By introducing link
variables, we show that our formula is identical to the recently proposed
four-dimensional scattering equations for form factors. Similarly to the case
of amplitudes, the link representation of form factors is shown to be directly
related to BCFW recursion relations, and is considerably more tractable than
the scattering equations. We also discuss how our results are related to a
recent Grassmannian formulation of form factors, and comment on a possible
derivation of our formula from ambitwistor strings.Comment: 16 pages, 3 figure | The connected prescription for form factors in twistor space | the connected prescription for form factors in twistor space | propose prescription twistor multiplet mathcal super mills generalisation roiban spradlin volovich superamplitudes. introducing factors. amplitudes bcfw recursion considerably tractable equations. grassmannian formulation comment derivation ambitwistor pages | non_dup | [] |
73397954 | 10.1007/JHEP11(2016)144 | We introduce the transverse momentum dependent fragmenting jet function
(TMDFJF), which appears in factorization theorems for cross sections for jets
with an identified hadron. These are functions of $z$, the hadron's
longitudinal momentum fraction, and transverse momentum,
$\boldsymbol{\mathrm{p}}_{\perp}$, relative to the jet axis. In the framework
of Soft-Collinear Effective Theory (SCET) we derive the TMDFJF from both a
factorized SCET cross section and the TMD fragmentation function defined in the
literature. The TMDFJFs are factorized into distinct collinear and
soft-collinear modes by matching onto SCET$_+$. As TMD calculations contain
rapidity divergences, both the renormalization group (RG) and rapidity
renormalization group (RRG) must be used to provide resummed calculations with
next-to-leading-logarithm prime (NLL') accuracy. We apply our formalism to the
production of $J/\psi$ within jets initiated by gluons. In this case the TMDFJF
can be calculated in terms of NRQCD (Non-relativistic quantum chromodynamics)
fragmentation functions. We find that when the $J/\psi$ carries a significant
fraction of the jet energy, the $p_T$ and $z$ distributions differ for
different NRQCD production mechanisms. Another observable with discriminating
power is the average angle that the $J/\psi$ makes with the jet axis.Comment: 25 pages, 7 figure | Transverse Momentum Dependent Fragmenting Jet Functions with
Applications to Quarkonium Production | transverse momentum dependent fragmenting jet functions with applications to quarkonium production | fragmenting tmdfjf factorization theorems jets hadron. hadron longitudinal boldsymbol mathrm perp axis. collinear scet derive tmdfjf factorized scet fragmentation literature. tmdfjfs factorized collinear collinear matching scet rapidity divergences renormalization rapidity renormalization resummed logarithm prime accuracy. formalism jets initiated gluons. tmdfjf nrqcd relativistic chromodynamics fragmentation functions. carries nrqcd mechanisms. observable discriminating pages | non_dup | [] |
73383596 | 10.1007/JHEP11(2016)145 | Three-loop vacuum integrals are an important building block for the
calculation of a wide range of three-loop corrections. Until now, only results
for integrals with one and two independent mass scales are known, but in the
electroweak Standard Model and many extensions thereof, one often encounters
more mass scales of comparable magnitude. For this reason, a numerical approach
for the evaluation of three-loop vacuum integrals with arbitrary mass pattern
is proposed here. Concretely, one can identify a basic set of three master
integral topologies. With the help of dispersion relations, each of these can
be transformed into one-dimensional or, for the most complicated case,
two-dimensional integrals in terms of elementary functions, which are suitable
for efficient numerical integration.Comment: 17 pages; ancillary file with subtraction formulae for the U5 master
integral in Mathematica format are supplied with this submission. v2: minor
typos corrected and few references added, version to published in JHE | Three-loop vacuum integrals with arbitrary masses | three-loop vacuum integrals with arbitrary masses | integrals corrections. integrals electroweak extensions thereof encounters comparable magnitude. integrals here. concretely master topologies. transformed complicated integrals elementary pages ancillary file subtraction formulae master mathematica format supplied submission. minor typos corrected | non_dup | [] |
73351263 | 10.1007/JHEP11(2016)148 | In light of the Higgs boson discovery we reconsider generation of the baryon
asymmetry in the non-minimal split Supersymmetry model with an additional
singlet superfield in the Higgs sector. We find that successful baryogenesis
during the first order electroweak phase transition is possible within
phenomenologically viable part of the model parameter space. We discuss several
phenomenological consequences of this scenario, namely, predictions for the
electric dipole moments of electron and neutron and collider signatures of
light charginos and neutralinos.Comment: 24 pages, 5 figure | Split NMSSM with electroweak baryogenesis | split nmssm with electroweak baryogenesis | boson discovery reconsider baryon asymmetry split supersymmetry singlet superfield sector. successful baryogenesis electroweak phenomenologically viable space. phenomenological consequences dipole moments neutron collider signatures charginos pages | non_dup | [] |
42734739 | 10.1007/JHEP11(2016)149 | We present the calculation of the impact factor for the $\gamma^{(*)}\to
q\bar{q}$ transition with one loop accuracy in arbitrary kinematics. The
calculation was done within Balitsky's high energy operator expansion. Together
with our previous result for the $\gamma^{(*)}\to q\bar{q} g$ Born impact
factor it allows one to derive cross-sections for 2- (one loop) and 3-jet
(Born) difractive electroproduction. We write such cross sections for the 2 and
3 jet exclusive diffractive electroproduction off a proton in terms of hadronic
matrix elements of Wilson lines. For the 2-jet cross section we demonstrate the
cancellation of IR, collinear and rapidity singularities. Our result can be
directly exploited to describe the recently analyzed data on exclusive dijet
production at HERA and used for the study of jet photoproduction in
ultraperipheral proton or nuclear scattering.Comment: 54 pages, 2 figure | On the one loop $\gamma^{(*)}\to q\bar{q}$ impact factor and the
exclusive diffractive cross sections for the production of two or three jets | on the one loop $\gamma^{(*)}\to q\bar{q}$ impact factor and the exclusive diffractive cross sections for the production of two or three jets | gamma kinematics. balitsky expansion. gamma born derive born difractive electroproduction. exclusive diffractive electroproduction proton hadronic wilson lines. cancellation collinear rapidity singularities. exploited exclusive dijet hera photoproduction ultraperipheral proton pages | non_dup | [] |
73399947 | 10.1007/JHEP11(2016)150 | We consider two possible flat space limits of three dimensional $\mathcal{N}
= (1,1)$ AdS supergravity. They differ by how the supercharges are scaled with
the AdS radius $\ell$: the first limit (democratic) leads to the usual
super-Poincare theory, while a novel `twisted' theory of supergravity stems
from the second (despotic) limit. We then propose boundary conditions such that
the asymptotic symmetry algebras at null infinity correspond to supersymmetric
extensions of the BMS algebras previously derived in connection to non- and
ultra-relativistic limits of the $\mathcal{N}=(1,1)$ Virasoro algebra in two
dimensions. Finally, we study the supersymmetric energy bounds and find the
explicit form of the asymptotic and global Killing spinors of supersymmetric
solutions in both flat space supergravity theories.Comment: 22 pages, v2 version published in JHE | Super-BMS$_3$ algebras from $\mathcal{N}=2$ flat supergravities | super-bms$_3$ algebras from $\mathcal{n}=2$ flat supergravities | mathcal supergravity. supercharges scaled democratic usual super poincare twisted supergravity stems despotic limit. propose asymptotic algebras infinity supersymmetric extensions algebras connection ultra relativistic mathcal virasoro dimensions. supersymmetric bounds asymptotic killing spinors supersymmetric supergravity pages | non_dup | [] |
73349970 | 10.1007/JHEP11(2016)152 | We find the first smooth microstate geometries with non-Abelian fields. The
solutions constitute an extension of the BPS three-charge smooth microstates.
These consist in general families of regular supersymmetric solutions with
non-trivial topology, i.e. bubbles, of $\mathcal{N}=1$, $d=5$
Super-Einstein-Yang-Mills theory, having the asymptotic charges of a black hole
or black ring but with no horizon. The non-Abelian fields make their presence
at the very heart of the microstate structure: the physical size of the bubbles
is affected by the non-Abelian topological charge they carry, which combines
with the Abelian flux threading the bubbles to hold them up. Interestingly the
non-Abelian fields carry a set of adjustable continuous parameters that do not
alter the asymptotics of the solutions but modify the local geometry. This
feature can be used to obtain a classically infinite number of microstate
solutions with the asymptotics of a single black hole or black ring.Comment: 27 pages, 1 figure. v2 references added and typos correcte | Non-Abelian bubbles in microstate geometries | non-abelian bubbles in microstate geometries | microstate geometries abelian fields. constitute microstates. consist families supersymmetric trivial topology i.e. bubbles mathcal super einstein mills asymptotic charges horizon. abelian microstate bubbles abelian topological carry combines abelian threading bubbles hold interestingly abelian carry adjustable alter asymptotics modify geometry. classically infinite microstate asymptotics pages figure. typos correcte | non_dup | [] |
42729202 | 10.1007/JHEP11(2016)153 | A sector with QCD-like strong dynamics is common in models of non-standard
physics. Such a model could be accessible in LHC searches if both confinement
and big-quarks charged under the confining group are at the TeV scale.
Big-quark masses at this scale can be explained if the new fermions are chiral
under a new $U(1)^\prime$ gauge symmetry such that their bare masses are
related to the $U(1)^\prime$-breaking and new confinement scales. Here we
present a study of a minimal GUT-motivated and gauge anomaly-free model with
implications for the LHC Run 2 searches. We find that the first signatures of
such models could appear as two gauge boson resonances. The chiral nature of
the model could be confirmed by observation of a $Z^\prime \gamma$ resonance,
where the $Z^\prime$ naturally has a large leptonic branching ratio because of
its kinetic mixing with the hypercharge gauge boson.Comment: Version accepted for publication in JHE | Phenomenology of Strongly Coupled Chiral Gauge Theories | phenomenology of strongly coupled chiral gauge theories | physics. accessible searches confinement quarks confining scale. fermions chiral prime bare prime breaking confinement scales. motivated anomaly searches. signatures boson resonances. chiral confirmed prime gamma prime naturally leptonic branching hypercharge publication | non_dup | [] |
42744492 | 10.1007/JHEP11(2016)154 | Heavy vector-like quarks coupled to a scalar $S$ will induce a coupling of
this scalar to gluons and possibly (if electrically charged) photons. The decay
of the heavy quark into $Sq$, with $q$ being a Standard Model quark, provides,
if kinematically allowed, new channels for heavy quark searches. Inspired by
naturalness considerations, we consider the case of a vector-like partner of
the top quark. For illustration, we show that a singlet partner can be searched
for at the 13$\,$TeV LHC through its decay into a scalar resonance in the
$2\gamma+\ell + X$ final states, especially if the diphoton branching ratio of
the scalar $S$ is further enhanced by the contribution of non coloured
particles. We then show that conventional heavy quark searches are also
sensitive to this new decay mode, when $S$ decays hadronically, by slightly
tightening the current selection cuts. Finally, we comment about the
possibility of disentangling, by scrutinising appropriate kinematic
distributions, heavy quark decays to $St$ from other standard decay modes.Comment: 8 pages, 3 figures and 1 table; v3: typos fixed. Matches published
versio | Implications of a High-Mass Diphoton Resonance for Heavy Quark Searches | implications of a high-mass diphoton resonance for heavy quark searches | quarks induce gluons possibly electrically photons. kinematically searches. inspired naturalness considerations partner quark. illustration singlet partner searched gamma diphoton branching coloured particles. searches decays hadronically tightening cuts. comment disentangling scrutinising kinematic decays pages typos fixed. matches versio | non_dup | [] |
42742515 | 10.1007/JHEP11(2016)155 | We propose a new method to evaluate jet substructure observables in inclusive
jet measurements, based upon semi-inclusive jet functions in the framework of
Soft Collinear Effective Theory (SCET). As a first example, we consider the jet
fragmentation function, where a hadron $h$ is identified inside a fully
reconstructed jet. We introduce a new semi-inclusive fragmenting jet function
${\mathcal G}^h_i(z= \omega_J/\omega,z_h=\omega_h/\omega_J,\omega_J, R,\mu)$,
which depends on the jet radius $R$ and the large light-cone momenta of the
parton `$i$' initiating the jet ($\omega$), the jet ($\omega_J$), and the
hadron $h$ ($\omega_h$). The jet fragmentation function can then be expressed
as a semi-inclusive observable, in the spirit of actual experimental
measurements, rather than as an exclusive one. We demonstrate the consistency
of the effective field theory treatment and standard perturbative QCD
calculations of this observable at next-to-leading order (NLO). The
renormalization group (RG) equation for the semi-inclusive fragmenting jet
function ${\mathcal G}_i^h(z,z_h, \omega_J, R,\mu)$ are also derived and shown
to follow exactly the usual timelike DGLAP evolution equations for
fragmentation functions. The newly obtained RG equations can be used to perform
the resummation of single logarithms of the jet radius parameter $R$ up to
next-to-leading logarithmic (NLL$_R$) accuracy. In combination with the fixed
NLO calculation, we obtain NLO+NLL$_R$ results for the hadron distribution
inside the jet. We present numerical results for $pp\to(\mathrm{jet}\,h)X$ in
the new framework, and find excellent agreement with existing LHC experimental
data.Comment: 28 pages, 6 figures, published versio | Jet substructure using semi-inclusive jet functions within SCET | jet substructure using semi-inclusive jet functions within scet | propose substructure observables inclusive inclusive collinear scet fragmentation hadron reconstructed jet. inclusive fragmenting mathcal omega omega omega omega omega cone momenta parton initiating omega omega hadron omega fragmentation inclusive observable spirit exclusive one. consistency perturbative observable renormalization inclusive fragmenting mathcal omega usual timelike dglap fragmentation functions. newly resummation logarithms logarithmic accuracy. hadron jet. mathrm excellent pages versio | non_dup | [] |
73361868 | 10.1007/JHEP11(2016)159 | Heavy scalar and pseudoscalar resonance searches through the $gg\rightarrow
S\rightarrow t\bar t$ process are challenging due to the peculiar behavior of
the large interference effects with the standard model $t\bar t$ background.
Such effects generate non-trivial lineshapes from additional relative phases
between the signal and background amplitudes. We provide the analytic
expressions for the differential cross sections to understand the interference
effects in the heavy scalar signal lineshapes. We extend our study to the case
of CP-violation and further consider the effect of bottom quarks in the
production and decay processes. We also evaluate the contributions from
additional particles to the gluon fusion production process, such as stops and
vector-like quarks, that could lead to significant changes in the behavior of
the signal lineshapes. Taking into account the large interference effects, we
perform lineshape searches at the LHC and discuss the importance of the
systematic uncertainties and smearing effects. We present projected
sensitivities for two LHC performance scenarios to probe the $gg\rightarrow S
\rightarrow t\bar t$ channel in various models.Comment: 44 pages, 17 figures; v2: minor updates, reference added, match the
published version on JHE | Challenges and opportunities for heavy scalar searches in the $t\bar t$
channel at the LHC | challenges and opportunities for heavy scalar searches in the $t\bar t$ channel at the lhc | pseudoscalar searches rightarrow rightarrow challenging peculiar interference background. trivial lineshapes amplitudes. analytic expressions interference lineshapes. extend violation quarks processes. gluon fusion stops quarks lineshapes. interference lineshape searches smearing effects. projected sensitivities scenarios rightarrow rightarrow pages minor updates match | non_dup | [] |
73391050 | 10.1007/JHEP11(2016)160 | In single-metric approximations to the exact renormalization group (RG) for
quantum gravity, it has been not been clear how to treat the large curvature
domain beyond the point where the effective cutoff scale $k$ is less than the
lowest eigenvalue of the appropriate modified Laplacian. We explain why this
puzzle arises from background dependence, resulting in Wilsonian RG concepts
being inapplicable. We show that when properly formulated over an ensemble of
backgrounds, the Wilsonian RG can be restored. This in turn implies that
solutions should be smooth and well defined no matter how large the curvature
is taken. Even for the standard single-metric type approximation schemes, this
construction can be rigorously derived by imposing a modified Ward identity
(mWI) corresponding to rescaling the background metric by a constant factor.
However compatibility in this approximation requires the space-time dimension
to be six. Solving the mWI and flow equation simultaneously, new variables are
then derived that are independent of overall background scale.Comment: 34 pages, 2 figures; various small improvement | Large curvature and background scale independence in single-metric
approximations to asymptotic safety | large curvature and background scale independence in single-metric approximations to asymptotic safety | approximations renormalization treat curvature cutoff eigenvalue laplacian. puzzle arises wilsonian concepts inapplicable. properly formulated ensemble backgrounds wilsonian restored. curvature taken. schemes rigorously imposing ward rescaling factor. compatibility six. solving simultaneously pages | non_dup | [] |
42663846 | 10.1007/JHEP11(2016)162 | Studying a quantum field theory involves a choice of space-time manifold and
a choice of background for any global symmetries of the theory. We argue that
many more choices are possible when specifying the background. In the context
of branes in string theory, the additional data corresponds to a choice of
supergravity tensor fluxes. We propose the existence of a landscape of field
theory backgrounds, characterized by the space-time metric, global symmetry
background and a choice of tensor fluxes. As evidence for this landscape, we
study the supersymmetric six-dimensional (2,0) theory compactified to two
dimensions. Different choices of metric and flux give rise to distinct
two-dimensional theories, which can preserve differing amounts of
supersymmetry.Comment: 33 pages, LaTe | A Landscape of Field Theories | a landscape of field theories | studying involves manifold symmetries theory. argue choices specifying background. branes supergravity fluxes. propose landscape backgrounds fluxes. landscape supersymmetric compactified dimensions. choices preserve differing amounts pages | non_dup | [] |
73370661 | 10.1007/JHEP11(2016)164 | Charged Higgs bosons are predicted in variety of theoretically well-motivated
new physics models with extended Higgs sectors. In this study, we focus on a
type-II two Higgs doublet model (2HDM-II) and consider a heavy charged Higgs
with its mass ranging from 500 GeV to 1 TeV as dictated by the $b\to s\gamma$
constraints which render $M_{H^\pm}>480$ GeV. We study the dominant production
mode $H^\pm t$ associated production with $H^\pm \to W^\pm A$ being the
dominant decay channel when the pseudoscalar $A$ is considerably lighter. For
such a heavy charged Higgs, both the decay products $W^\pm$ and $A$ are
relatively boosted. In such a scenario, we apply the jet substructure analysis
of tagging the fat pseudoscalar and $W$ jets in order to eliminate the standard
model background efficiently. We perform a detailed detector simulation for the
signal and background processes at the 14 TeV LHC. We introduce various
kinematical cuts to determine the signal significance for a number of benchmark
points with charged Higgs boson mass from 500 GeV to 1 TeV in the $W^\pm A$
decay channel. Finally we perform a multivariate analysis utilizing a boosted
decision tree algorithm to optimize these significances.Comment: 25 pages, 7 Tables, 12 figures, Matches Published Version in JHE | Boosting the charged Higgs search prospects using jet substructure at
the LHC | boosting the charged higgs search prospects using jet substructure at the lhc | bosons theoretically motivated sectors. doublet ranging dictated gamma render gev. pseudoscalar considerably lighter. boosted. substructure tagging pseudoscalar jets eliminate efficiently. lhc. kinematical cuts benchmark boson channel. multivariate utilizing boosted optimize pages tables matches | non_dup | [] |
73367098 | 10.1007/JHEP11(2016)166 | We compute the entanglement and R\'enyi entropy growth after a global quench
in various dimensions in free scalar field theory. We study two types of
quenches: a boundary state quench and a global mass quench. Both of these
quenches are investigated for a strip geometry in 1, 2, and 3 spatial
dimensions, and for a spherical geometry in 2 and 3 spatial dimensions. We
compare the numerical results for massless free scalars in these geometries
with the predictions of the analytical quasiparticle model based on EPR pairs,
and find excellent agreement in the limit of large region sizes. At subleading
order in the region size, we observe an anomalous logarithmic growth of
entanglement coming from the zero mode of the scalar.Comment: v2: references added, minor improvements; v1: 32 pages, 9 figure | Entanglement Growth after a Global Quench in Free Scalar Field Theory | entanglement growth after a global quench in free scalar field theory | entanglement enyi quench theory. quenches quench quench. quenches strip spherical dimensions. massless scalars geometries quasiparticle excellent sizes. subleading anomalous logarithmic entanglement coming minor improvements pages | non_dup | [] |
42745316 | 10.1007/JHEP11(2016)167 | We evaluate the prompt atmospheric neutrino flux at high energies using three
different frameworks for calculating the heavy quark production cross section
in QCD: NLO perturbative QCD, $k_T$ factorization including low-$x$
resummation, and the dipole model including parton saturation. We use QCD
parameters, the value for the charm quark mass and the range for the
factorization and renormalization scales that provide the best description of
the total charm cross section measured at fixed target experiments, at RHIC and
at LHC. Using these parameters we calculate differential cross sections for
charm and bottom production and compare with the latest data on forward charm
meson production from LHCb at $7$ TeV and at $13$ TeV, finding good agreement
with the data. In addition, we investigate the role of nuclear shadowing by
including nuclear parton distribution functions (PDF) for the target air
nucleus using two different nuclear PDF schemes. Depending on the scheme used,
we find the reduction of the flux due to nuclear effects varies from $10\%$ to
$50 \%$ at the highest energies. Finally, we compare our results with the
IceCube limit on the prompt neutrino flux, which is already providing valuable
information about some of the QCD models.Comment: 61 pages, 25 figures, 11 table | Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear
effects | prompt atmospheric neutrino fluxes: perturbative qcd models and nuclear effects | prompt frameworks calculating perturbative factorization resummation dipole parton saturation. charm factorization renormalization charm rhic lhc. charm latest charm meson lhcb data. shadowing parton nucleus schemes. varies energies. icecube prompt valuable pages | non_dup | [] |
73362509 | 10.1007/JHEP11(2016)168 | We study the higher-spin gauge theory in six-dimensional anti-de Sitter space
$AdS_6$ that is based on the exceptional Lie superalgebra $F(4)$. The relevant
higher-spin algebra was constructed in arXiv:1409.2185 [hep-th]. We determine
the spectrum of the theory and show that it contains the physical fields of the
Romans $F(4)$ gauged supergravity. The full spectrum consists of an infinite
tower of unitary supermultiplets of $F(4)$ which extend the Romans multiplet to
higher spins plus a single short supermultiplet.
Motivated by applications to this novel supersymmetric higher-spin theory as
well as to other theories, we extend the known one-loop tests of $AdS/CFT$
duality in various directions. The spectral zeta-function is derived for the
most general case of fermionic and mixed-symmetry fields, which allows one to
test the Type-A and B theories and supersymmetric extensions thereof in any
dimension. We also study higher-spin doubletons and partially-massless fields.
While most of the tests are successfully passed, the Type-B theory in all even
dimensional anti-de Sitter spacetimes presents an interesting puzzle: the free
energy as computed from the bulk is not equal to that of the free fermion on
the CFT side, though there is some systematics to the discrepancy.Comment: 45 pages + 30 pages of Appendices; typo fixed, notation improve | Exceptional F(4) Higher-Spin Theory in AdS(6) at One-Loop and other
Tests of Duality | exceptional f(4) higher-spin theory in ads(6) at one-loop and other tests of duality | sitter exceptional superalgebra romans gauged supergravity. infinite tower unitary supermultiplets extend romans multiplet spins supermultiplet. motivated supersymmetric extend duality directions. zeta fermionic supersymmetric extensions thereof dimension. doubletons partially massless fields. successfully passed sitter spacetimes presents puzzle fermion systematics pages pages appendices typo notation | non_dup | [] |
42742198 | 10.1007/JHEP11(2016)170 | We study the linearized transport of transverse momentum and charge in a
conjectured field theory dual to a black brane solution of Horava gravity with
Lifshitz exponent $z=1$. As expected from general hydrodynamic reasoning, we
find that both of these quantities are diffusive over distance and time scales
larger than the inverse temperature. We compute the diffusion constants and
conductivities of transverse momentum and charge, as well the ratio of shear
viscosity to entropy density, and find that they differ from their relativistic
counterparts. To derive these results, we propose how the holographic
dictionary should be modified to deal with the multiple horizons and differing
propagation speeds of bulk excitations in Horava gravity. When possible, as a
check on our methods and results, we use the covariant Einstein-Aether
formulation of Horava gravity, along with field redefinitions, to re-derive our
results from a relativistic bulk theory.Comment: v2: minor changes, added references; 30 pages, 1 figur | Momentum and charge transport in non-relativistic holographic fluids
from Ho\v{r}ava gravity | momentum and charge transport in non-relativistic holographic fluids from ho\v{r}ava gravity | linearized conjectured brane horava lifshitz exponent hydrodynamic reasoning quantities diffusive temperature. conductivities viscosity relativistic counterparts. derive propose holographic dictionary deal horizons differing propagation speeds excitations horava gravity. check covariant einstein aether formulation horava redefinitions derive relativistic minor pages figur | non_dup | [] |
73365389 | 10.1007/JHEP11(2016)171 | In this short paper we look at the action of T-duality and string duality
groups on fermions, in maximally-supersymmetric theories and related theories.
Briefly, we argue that typical duality groups such as SL(2,Z) have sign
ambiguities in their actions on fermions, and propose that pertinent duality
groups be extended by Z_2, to groups such as the metaplectic group.
Specifically, we look at duality groups arising from mapping class groups of
tori in M theory compactifications, T-duality, ten-dimensional type IIB
S-duality, and (briefly) four-dimensional N=4 super Yang-Mills, and in each
case, propose that the full duality group is a nontrivial Z_2 extension of the
duality group acting on bosonic degrees of freedom, to more accurately describe
possible actions on fermions. We also walk through U-duality groups for
toroidal compactifications to nine, eight, and seven dimensions, which enables
us to perform cross-consistency tests of these proposals.Comment: 20 pages, LaTeX; v2: references adde | Duality group actions on fermions | duality group actions on fermions | look duality duality fermions maximally supersymmetric theories. briefly argue duality ambiguities fermions propose pertinent duality metaplectic group. look duality arising tori compactifications duality duality briefly super mills propose duality nontrivial duality acting bosonic freedom accurately fermions. walk duality toroidal compactifications nine eight seven enables consistency pages latex adde | non_dup | [] |
73376500 | 10.1007/JHEP11(2016)172 | In a Mirror Twin World with a maximally symmetric Higgs sector the little
hierarchy of the Standard Model can be significantly mitigated, perhaps
displacing the cutoff scale above the LHC reach. We show that consistency with
observations requires that the Z2 parity exchanging the Standard Model with its
mirror be broken in the Yukawa couplings. A minimal such effective field
theory, with this sole Z2 breaking, can generate the Z2 breaking in the Higgs
sector necessary for the Twin Higgs mechanism. The theory has constrained and
correlated signals in Higgs decays, direct Dark Matter Detection and Dark
Radiation, all within reach of foreseen experiments, over a region of parameter
space where the fine-tuning for the electroweak scale is 10-50%. For dark
matter, both mirror neutrons and a variety of self-interacting mirror atoms are
considered. Neutrino mass signals and the effects of a possible additional Z2
breaking from the vacuum expectation values of B-L breaking fields are also
discussed.Comment: 42 pages, 8 figures; additional references and discussion on higgs
physics and dark matte | Minimal Mirror Twin Higgs | minimal mirror twin higgs | mirror twin maximally hierarchy mitigated perhaps displacing cutoff reach. consistency parity exchanging mirror broken yukawa couplings. sole breaking breaking twin mechanism. constrained decays foreseen fine tuning electroweak mirror neutrons interacting mirror considered. breaking expectation breaking pages matte | non_dup | [] |
42751880 | 10.1007/JHEP11(2016)173 | We study the origin of neutrino mass from $SO(10)$ arising from $M$ Theory
compactified on a $G_2$-manifold. This is linked to the problem of the breaking
of the extra $U(1)$ gauge group, in the $SU(5)\times U(1)$ subgroup of
$SO(10)$, which we show can achieved via a (generalised) Kolda-Martin
mechanism. The resulting neutrino masses arise from a combination of the seesaw
mechanism and induced R-parity breaking contributions. The rather complicated
neutrino mass matrix is analysed for one neutrino family and it is shown how
phenomenologically acceptable neutrino masses can emerge.Comment: 32 pages, 12 figure | Neutrino mass from M Theory SO(10) | neutrino mass from m theory so(10) | arising compactified manifold. breaking extra subgroup generalised kolda martin mechanism. arise seesaw parity breaking contributions. complicated analysed phenomenologically acceptable pages | non_dup | [] |
73380938 | 10.1007/JHEP11(2016)175 | The Coulomb and Higgs branches of certain 3d N=4 gauge theories can be
understood as closures of nilpotent orbits. Recently, a new theorem by Namikawa
suggests that this is the simplest possible case, thus giving this class a
special role. In this note we use branes to reproduce the mathematical work by
Kraft and Procesi. It studies the classification of all nilpotent orbits for
classical groups and it characterizes an inclusion relation via minimal
singularities. We show how these minimal singularities arise naturally in the
Type IIB superstring embedding of the 3d A-type theories. The Higgs mechanism
can be used to remove the minimal singularity, corresponding to a transition in
the brane configuration that induces a new effective 3d theory. This reproduces
the Kraft-Procesi results, endowing the family of gauge theories with a new
underlying structure. We provide an efficient procedure for computing such
brane transitions.Comment: 64 pages, 37 figures, 16 table | Branes and the Kraft-Procesi Transition | branes and the kraft-procesi transition | coulomb branches understood closures nilpotent orbits. namikawa simplest giving role. branes reproduce mathematical kraft procesi. nilpotent orbits characterizes inclusion singularities. singularities arise naturally superstring embedding theories. remove singularity brane induces theory. reproduces kraft procesi endowing structure. brane pages | non_dup | [] |
73397464 | 10.1007/JHEP11(2016)177 | Witten indices and partition functions are computed for abelian 6d tensor and
hypermultiplets on $\mathbb{R}\times S^5$ in Lorentzian signature in an R gauge
field background which preserves some supersymmetry. We consider a generic
supersymmetric squashing that also admits squashing of the Hopf fiber. Wick
rotation to Euclidean M5 brane amounts to Wick rotation of squashing parameters
and the hypermultiplet mass parameter. We compute Casimir energies for tensor
and hypermultiplets separately for general squashing, and match these with the
corresponding gravitational anomaly polynomials. We extract Witten indices on
$\mathbb{R}\times \mathbb{CP}^2$ and find that this is zero, again matching
with the vanishing anomaly polynomial on an odd dimensional space.Comment: 48 pages, several clarifications adde | Witten indices of abelian M5 brane on $\mathbb{R}\times S^5$ | witten indices of abelian m5 brane on $\mathbb{r}\times s^5$ | witten indices partition abelian hypermultiplets mathbb lorentzian signature preserves supersymmetry. generic supersymmetric squashing admits squashing hopf fiber. wick euclidean brane amounts wick squashing hypermultiplet parameter. casimir hypermultiplets separately squashing match gravitational anomaly polynomials. extract witten indices mathbb mathbb matching vanishing anomaly pages clarifications adde | non_dup | [] |
73389530 | 10.1007/JHEP11(2016)178 | We calculate the trace anomaly of a Weyl fermion coupled to gravity by using
Fujikawa's method supplemented by the choice of a consistent regulator. The
latter is constructed out of Pauli-Villars regulating fields. The motivation
for presenting such a calculation stems from recent studies that suggest that
the trace anomaly of chiral fermions in four dimensions might contain an
imaginary part proportional to the Pontryagin density. We find that the trace
anomaly of a Weyl fermion is given by half the trace anomaly of a Dirac
fermion, so that no imaginary part proportional to the Pontryagin density is
seen to arise.Comment: 25 pages, added references and acknowledgment | On the trace anomaly of a Weyl fermion | on the trace anomaly of a weyl fermion | trace anomaly weyl fermion fujikawa supplemented regulator. pauli villars regulating fields. motivation presenting stems trace anomaly chiral fermions imaginary pontryagin density. trace anomaly weyl fermion trace anomaly dirac fermion imaginary pontryagin pages acknowledgment | non_dup | [] |
73349765 | 10.1007/JHEP11(2016)179 | T-branes are supersymmetric configurations described by multiple Dp-branes
with worldvolume flux and non-commuting vacuum expectation values for two of
the worldvolume scalars. When these values are much larger than the string
scale this description breaks down. We show that in this regime the correct
description of T-branes is in terms of a single Dp-brane, whose worldvolume
curvature encodes the T-brane data. We present the tale of the journey to reach
this picture, which takes us through T-dualities and rugby-ball-shaped brane
configurations that no eye has gazed upon before.Comment: 19 pages, 4 figure | There and back again: A T-brane's tale | there and back again: a t-brane's tale | branes supersymmetric configurations branes worldvolume commuting expectation worldvolume scalars. breaks down. branes brane worldvolume curvature encodes brane data. tale journey picture dualities rugby ball shaped brane configurations gazed pages | non_dup | [] |
42752557 | 10.1007/JHEP11(2016)180 | We present a holographic method for computing the response of R\'enyi
entropies in conformal field theories to small shape deformations around a flat
(or spherical) entangling surface. Our strategy employs the stress tensor
one-point function in a deformed hyperboloid background and relates it to the
coefficient in the two-point function of the displacement operator. We obtain
explicit numerical results for $d=3,\dots,6$ spacetime dimensions, and also
evaluate analytically the limits where the R\'enyi index approaches 1 and 0 in
general dimensions. We use our results to extend the work of 1602.08493 and
disprove a set of conjectures in the literature regarding the relations between
the R\'enyi shape dependence and the conformal weight of the twist operator. We
also extend our analysis beyond leading order in derivatives in the bulk theory
by studying Gauss-Bonnet gravity.Comment: 33 pages, 4 figure | Shape Dependence of Holographic R\'enyi Entropy in General Dimensions | shape dependence of holographic r\'enyi entropy in general dimensions | holographic enyi entropies conformal deformations spherical entangling surface. employs deformed hyperboloid relates displacement operator. dots spacetime analytically enyi dimensions. extend disprove conjectures enyi conformal twist operator. extend derivatives studying gauss bonnet pages | non_dup | [] |
42751686 | 10.1007/JHEP11(2016)181 | The top squarks (stops) may be the most wanted particles after the Higgs
boson discovery. The searches for the lightest stop have put strong constraints
on its mass. However, there is still a search gap in the low mass region if the
spectrum of the stop and the lightest neutralino is compressed. In that case,
it may be easier to look for the second stop since naturalness requires both
stops to be close to the weak scale. The current experimental searches for the
second stop are based on the simplified model approach with the decay modes
$\tilde{t}_2 \to \tilde{t}_1 Z$ and $\tilde{t}_2 \to \tilde{t}_1 h$. However,
in a realistic supersymmetric spectrum there is always a sbottom lighter than
the second stop, hence the decay patterns are usually more complicated than the
simplified model assumptions. In particular, there are often large branching
ratios of the decays $\tilde{t}_2 \to \tilde{b}_1 W$ and $\tilde{b}_1 \to
\tilde{t}_1 W$ as long as they are open. The decay chains can be even more
complex if there are intermediate states of additional charginos and
neutralinos in the decays. By studying several MSSM benchmark models at the 14
TeV LHC, we point out the importance of the multi-$W$ final states in the
second stop and the sbottom searches, such as the same-sign dilepton and
multilepton signals, aside from the traditional search modes. The observed
same-sign dilepton excesses at LHC Run 1 and Run 2 may be explained by some of
our benchmark models. We also suggest that the vector boson tagging and a new
kinematic variable may help to suppress the backgrounds and increase the signal
significance for some search channels. Due to the complex decay patterns and
lack of the dominant decay channels, the best reaches likely require a
combination of various search channels at the LHC for the second stop and the
lightest sbottom.Comment: 46 pages, 9 figures, updated experimental constraints and benchmark
points after the ICHEP2016 data, published in JHE | Second Stop and Sbottom Searches with a Stealth Stop | second stop and sbottom searches with a stealth stop | squarks stops wanted boson discovery. searches lightest stop mass. stop lightest neutralino compressed. easier look stop naturalness stops scale. searches stop simplified tilde tilde tilde tilde realistic supersymmetric sbottom lighter stop complicated simplified assumptions. branching decays tilde tilde tilde tilde open. chains charginos neutralinos decays. studying mssm benchmark stop sbottom searches dilepton multilepton aside traditional modes. dilepton excesses benchmark models. boson tagging kinematic suppress backgrounds channels. reaches stop lightest pages updated benchmark ichep | non_dup | [] |
73414412 | 10.1007/JHEP11(2016)182 | We present concrete embeddings of fibre inflation models in globally
consistent type IIB Calabi-Yau orientifolds with closed string moduli
stabilisation. After performing a systematic search through the existing list
of toric Calabi-Yau manifolds, we find several examples that reproduce the
minimal setup to embed fibre inflation models. This involves Calabi-Yau
manifolds with $h^{1,1}= 3$ which are K3 fibrations over a $\mathbb{P}^1$ base
with an additional shrinkable rigid divisor. We then provide different
consistent choices of the underlying brane set-up which generate a
non-perturbative superpotential suitable for moduli stabilisation and string
loop corrections with the correct form to drive inflation. For each Calabi-Yau
orientifold setting, we also compute the effect of higher derivative
contributions and study their influence on the inflationary dynamics.Comment: 27 pages + appendix, 2 figures; references adde | Global Embedding of Fibre Inflation Models | global embedding of fibre inflation models | concrete embeddings fibre inflation globally calabi orientifolds moduli stabilisation. performing toric calabi manifolds reproduce setup embed fibre inflation models. involves calabi manifolds fibrations mathbb shrinkable rigid divisor. choices brane perturbative superpotential moduli stabilisation drive inflation. calabi orientifold inflationary pages adde | non_dup | [] |
73379301 | 10.1007/JHEP11(2016)183 | We evaluate the electromagnetic spectral function in QCD plasma in a
nonperturbative background of in-medium quark and gluon condensates by
incorporating the leading order power corrections in a systematic framework
within the ambit of the operator product expansion in D=4 dimension. We
explicitly show that the mixing of the composite operators removes mass
singularities and renders Wilson coefficients finite and well defined. As a
spectral property, we then obtain the nonperturbative dilepton production rate
from QCD plasma. The operator product expansion automatically restricts the
dilepton rate to the intermediate mass range, which is found to be enhanced due
to the power corrections. We also compare our result with those from
nonperturbative calculations, e.g., lattice QCD and effective QCD models based
on Polyakov loop.Comment: 24 pages, 8 figures; Discussion added on OPE scales, version accepted
in JHE | Power corrections to the electromagnetic spectral function and the
dilepton rate in QCD plasma within operator product expansion in D=4 | power corrections to the electromagnetic spectral function and the dilepton rate in qcd plasma within operator product expansion in d=4 | electromagnetic nonperturbative gluon condensates incorporating ambit dimension. explicitly composite removes singularities renders wilson defined. nonperturbative dilepton plasma. automatically restricts dilepton corrections. nonperturbative e.g. polyakov pages | non_dup | [] |
73374752 | 10.1007/JHEP11(2016)184 | We revisit the nonthermal gravitino production at the (p)reheating stage
after inflation. Particular attention is paid to large field inflation models
with a $\mathbb{Z}_2$ symmetry, for which the previous perturbative analysis is
inapplicable; and inflation models with a stabilizer superfield, which have not
been studied non-perturbatively. It is found that in single-superfield
inflation models (without the stabilizer field), nonthermal production of the
transverse gravitino can be cosmologically problematic while the abundance of
the longitudinal gravitino is small enough. In multi-superfield inflation
models (with the stabilizer field), production of the transverse and
longitudinal gravitinos is significantly suppressed, and they are
cosmologically harmless. We also clarify the relation between the background
field method used in the preheating context and the standard perturbative decay
method to estimate the gravitino abundance.Comment: 47 pages, 3 figures; v3, published version, extended discussions in
Section 5 and Appendix | Nonthermal Gravitino Production after Large Field Inflation | nonthermal gravitino production after large field inflation | revisit nonthermal gravitino reheating inflation. paid inflation mathbb perturbative inapplicable inflation stabilizer superfield perturbatively. superfield inflation stabilizer nonthermal gravitino cosmologically problematic abundance longitudinal gravitino enough. superfield inflation stabilizer longitudinal gravitinos suppressed cosmologically harmless. clarify preheating perturbative gravitino pages discussions | non_dup | [] |
83861756 | 10.1007/JHEP11(2017)001 | We point out that leptonic weak-basis invariants are an important tool for
the study of the properties of lepton flavour models. In particular, we show
that appropriately chosen invariants can give a clear indication of whether a
particular lepton flavour model favours normal or inverted hierarchy for
neutrino masses and what is the octant of $\theta_{23}$. These invariants can
be evaluated in any conveniently chosen weak-basis and can also be expressed in
terms of neutrino masses, charged lepton masses, mixing angles and CP violation
phases.Comment: 10 pages, no figure | Leptonic Invariants, Neutrino Mass-Ordering and the Octant of
$\theta_{23}$ | leptonic invariants, neutrino mass-ordering and the octant of $\theta_{23}$ | leptonic invariants lepton flavour models. appropriately invariants indication lepton flavour favours inverted hierarchy octant theta invariants conveniently lepton angles violation pages | non_dup | [] |
86416818 | 10.1007/JHEP11(2017)003 | The angular distributions of lepton pairs in the Drell-Yan process can
provide rich information on the underlying QCD production mechanisms. These
dynamics can be parameterised in terms of a set of frame dependent angular
coefficients, $A_{i=0,\ldots,7}$, which depend on the invariant mass,
transverse momentum, and rapidity of the lepton pair. Motivated by recent
measurements of these coefficients by ATLAS and CMS, and in particular by the
apparent violation of the Lam-Tung relation $A_0-A_2=0$, we perform a precision
study of the angular coefficients at $\mathcal{O}(\alpha_s^3)$ in perturbative
QCD. We make predictions relevant for $pp$ collisions at $\sqrt{s} = 8$ TeV,
and perform comparisons with the available ATLAS and CMS data as well as
providing predictions for a prospective measurement at LHCb. To expose the
violation of the Lam-Tung relationship we propose a new observable
$\Delta^\mathrm{LT} = 1-A_2/A_0$ that is more sensitive to the dynamics in the
region where $A_0$ and $A_2$ are both small. We find that the
$\mathcal{O}(\alpha_s^3)$ corrections have an important impact on the $p_{T,Z}$
distributions for several of the angular coefficients, and are essential to
provide an adequate description of the data. The compatibility of the available
ATLAS and CMS data is reassessed by performing a partial $\chi^2$ test with
respect to the central theoretical prediction which shows that
$\chi^2/N_\mathrm{data}$ is significantly reduced by going from
$\mathcal{O}(\alpha_s^2)$ to $\mathcal{O}(\alpha_s^3)$.Comment: 21 pages + refs, 13 figures. v2 reflects published JHEP version.
Includes the evaluation of uncorrelated scale uncertainties when computing
the angular coefficients. Plots and text updated accordingl | Precise predictions for the angular coefficients in Z-boson production
at the LHC | precise predictions for the angular coefficients in z-boson production at the lhc | lepton drell mechanisms. parameterised ldots rapidity lepton pair. motivated atlas apparent violation tung precision mathcal alpha perturbative qcd. collisions sqrt comparisons atlas prospective lhcb. expose violation tung propose observable delta mathrm small. mathcal alpha adequate data. compatibility atlas reassessed performing mathrm going mathcal alpha mathcal alpha .comment pages refs figures. reflects jhep version. uncorrelated coefficients. plots updated accordingl | non_dup | [] |
84326425 | 10.1007/JHEP11(2017)004 | In Neutrinophilic Two Higgs Doublet Models, Dirac neutrino masses are
obtained by forbidding a Majorana mass term for the right-handed neutrinos via
a symmetry. We study a variation of such models in which that symmetry is taken
to be a local U(1), leading naturally to the typical Lagrangian of the inverse
seesaw scenario. The presence of a new gauge boson and of an extended scalar
sector result in a rich phenomenology, including modifications to Z, Higgs and
kaon decays as well as to electroweak precision parameters, and a pseudoscalar
associated to the breaking of lepton number.Comment: 21 pages, 2 figures, matches the published version in JHE | A Neutrinophilic 2HDM as a UV Completion for the Inverse Seesaw
Mechanism | a neutrinophilic 2hdm as a uv completion for the inverse seesaw mechanism | neutrinophilic doublet dirac forbidding majorana handed neutrinos symmetry. naturally lagrangian seesaw scenario. boson phenomenology modifications kaon decays electroweak precision pseudoscalar breaking lepton pages matches | non_dup | [] |