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9259082 | 10.1007/JHEP12(2012)070 | We consider back-reaction by non-supersymmetric D7/anti-D7 probe branes in
the Kuperstein-Sonnenschein model at finite temperature. Using the smearing
technique, we obtain an analytical solution for the back-reacted background to
leading order in N_f/N_c. This back-reaction explicitly breaks the conformal
invariance and introduces a dimension 6 operator in the dual field theory which
is an irrelevant deformation of the original conformal field theory. We further
probe this back-reacted background by introducing an additional set of probe
brane/anti-brane. This additional probe sector undergoes a chiral phase
transition at finite temperature, which is absent when the back-reaction
vanishes. We investigate the corresponding phase diagram and the thermodynamics
associated with this phase transition. We also argue that additional probes do
not suffer from any instability caused by the back-reaction, which suggests
that this system is stable beyond the probe limit.Comment: 56 pages, 8 figures. References updated, improved discussion on
dimension eight operato | Back-reaction of Non-supersymmetric Probes: Phase Transition and
Stability | back-reaction of non-supersymmetric probes: phase transition and stability | supersymmetric branes kuperstein sonnenschein temperature. smearing reacted explicitly breaks conformal invariance introduces irrelevant deformation conformal theory. reacted introducing brane brane. undergoes chiral absent vanishes. thermodynamics transition. argue probes suffer instability pages figures. updated eight operato | non_dup | [] |
24767591 | 10.1007/JHEP12(2012)071 | We construct tachyon vacuum and half-brane solutions, using an extension of
KBc algebra, in the theory around a type of identity-based marginal solutions
in modified cubic superstring field theory. With explicit computations, we find
that their vacuum energies are the same as those of corresponding solutions
around the original theory. It implies that the vacuum energy for the
identity-based marginal solution vanishes although straightforward computation
of it is subtle. We also evaluate the gauge invariant overlaps for those
nontrivial solutions. The values for them are deformed according to the
marginal solution in the same way as the case of bosonic string field theory.Comment: 23 pages; v2:minor correction | On Nontrivial Solutions around a Marginal Solution in Cubic Superstring
Field Theory | on nontrivial solutions around a marginal solution in cubic superstring field theory | tachyon brane marginal cubic superstring theory. computations theory. marginal vanishes straightforward subtle. overlaps nontrivial solutions. deformed marginal bosonic pages minor | non_dup | [] |
60622961 | 10.1007/JHEP12(2012)072 | Journal of High Energy Physics 2012.12 (2012): 072 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA measurement of B0 s → J /ψφ decay parameters, including the CP -violating weak phase φ s and the decay width difference ΔΓ s is reported, using 4.9 fb-1 of integrated luminosity collected in 2011 by the ATLAS detector from LHC pp collisions at a centre-of-mass energy √s = 7 TeV. The mean decay width Γs and the transversity amplitudes |A 0(0)|2 and |AІІ(0)|2 are also measured. The values reported for these parameters are: φs = 0.22 ± 0.41 (stat) ± 0.10 (syst) rad} ΔΓ s = 0.053 ± 0.021 (stat) ± 0.010 (syst) ps-1 Γ s = 0.677 ± 0.007 (stat) ± 0.004 (syst) ps-1 |A0(0)|2 = 0.528 ± 0.006 (stat) ± 0.009 (syst) |AІІ(0)|2 = 0.220 ± 0.008 (stat) ± 0.007 (syst) where the values quoted for φ s and ΔΓ s correspond to the solution compatible with the external measurements to which the strong phase δ⊥ is constrained and where ΔΓ s is constrained to be positive. The fraction of S-wave KK or f 0 contamination through the decays B0 s→ J /ψK + K- (f0) is measured as well and is found to be consistent with zero. Results for φ s and ΔΓ s are also presented as 68%, 90% and 95% likelihood contours, which show agreement with Standard Model expectation | Time-dependent angular analysis of the decay B0 s → J / ψ φ and extraction of ΔΓ s and the CP-violating weak phase φ s by ATLAS | time-dependent angular analysis of the decay b0 s → j / ψ φ and extraction of δγ s and the cp-violating weak phase φ s by atlas | reproduced permission scuola internazionale superiore studi avanzati sissa artículo escrito elevado número autores solo referencian aparece primer lugar nombre grupo colaboración hubiere autores pertenecientes uama violating luminosity atlas collisions tev. transversity amplitudes measured. stat syst stat syst stat syst stat syst stat syst quoted compatible constrained constrained positive. contamination decays zero. likelihood contours expectation | non_dup | [] |
24765125 | 10.1007/JHEP12(2012)073 | We study the ground-state octet baryon masses and sigma terms using the
covariant baryon chiral perturbation theory (ChPT) with the
extended-on-mass-shell (EOMS) renormalization scheme up to
next-to-next-to-next-to-leading order (N$^3$LO). By adjusting the available 19
low-energy constants (LECs), a reasonable fit of the $n_f=2+1$ lattice quantum
chromodynamics (LQCD) results from the PACS-CS, LHPC, HSC, QCDSF-UKQCD and
NPLQCD collaborations is achieved. Finite-volume corrections to the lattice
data are calculated self-consistently. Our study shows that N$^3$LO BChPT
describes better the light quark mass evolution of the lattice data than the
NNLO BChPT does and the various lattice simulations seem to be consistent with
each other. We also predict the pion and strangeness sigma terms of the octet
baryons using the LECs determined in the fit of their masses. The predicted
pion- and strangeness-nucleon sigma terms are $\sigma_{\pi N}=43(1)(6)$ MeV and
$\sigma_{s N}=126(24)(54)$ MeV, respectively.Comment: 28 pages, 6 figures, minor revisions, typos corrected, version to
appear in JHE | Octet baryon masses in next-to-next-to-next-to-leading order covariant
baryon chiral perturbation theory | octet baryon masses in next-to-next-to-next-to-leading order covariant baryon chiral perturbation theory | octet baryon sigma covariant baryon chiral perturbation chpt eoms renormalization adjusting lecs reasonable chromodynamics lqcd pacs lhpc qcdsf ukqcd nplqcd collaborations achieved. consistently. bchpt describes nnlo bchpt seem other. predict pion strangeness sigma octet baryons lecs masses. pion strangeness nucleon sigma sigma sigma pages minor revisions typos corrected | non_dup | [] |
8781400 | 10.1007/JHEP12(2012)074 | Motivated by the recent Kitaev's K-theory analysis of topological insulators
and superconductors, we adopt the same framework to study the topological phase
structure of Jackiw-Rebbi model in 3+1 dimensions. According to the K-theory
analysis based on the properties of the charge conjugation and time reversal
symmetries, we classify the topological phases of the model. In particular, we
find that there exist $\mathbf{Z}$ Majorana zero-modes hosted by the
hedgehogs/t'Hooft-Polyakov monopoles, if the model has a $T^2=1$ time reversal
symmetry. Guided by the K-theory results, we then explicitly show that a single
Majorana zero mode solution exists for the SU(2) doublet fermions in some
co-dimensional one planes of the mass parameter space. It turns out we can see
the existence of none or a single zero mode when the fermion doublet is only
two. We then take a step further to consider four-fermion case and find there
can be zero, one or two normalizable zero mode in some particular choices of
mass matrices. Our results also indicate that a single normalizable Majorana
zero mode can be compatible with the cancellation of SU(2) Witten anomaly.Comment: 29 pages, 3 figures; v2, typos correcte | Majorana Zero-modes and Topological Phases of Multi-flavored
Jackiw-Rebbi model | majorana zero-modes and topological phases of multi-flavored jackiw-rebbi model | motivated kitaev topological insulators superconductors adopt topological jackiw rebbi dimensions. conjugation reversal symmetries classify topological model. mathbf majorana hosted hedgehogs hooft polyakov monopoles reversal symmetry. guided explicitly majorana doublet fermions planes space. turns none fermion doublet two. fermion normalizable choices matrices. normalizable majorana compatible cancellation witten pages typos correcte | non_dup | [] |
24772161 | 10.1007/JHEP12(2012)078 | In this paper we consider axisymmetric black holes in supergravity and
address the general issue of defining a first order description for them. The
natural setting where to formulate the problem is the De
Donder-Weyl-Hamilton-Jacobi theory associated with the effective
two-dimensional sigma-model action describing the axisymmetric solutions. We
write the general form of the two functions S_m defining the first-order
equations for the fields. It is invariant under the global symmetry group G_(3)
of the sigma-model. We also discuss the general properties of the solutions
with respect to these global symmetries, showing that they can be encoded in
two constant matrices belonging to the Lie algebra of G_(3), one being the
Noether matrix of the sigma model, while the other is non-zero only for
rotating solutions. These two matrices allow a G_(3)-invariant characterization
of the rotational properties of the solution and of the extremality condition.
We also comment on extremal, under-rotating solutions from this point of view.Comment: 26 pages, LaTeX sourc | Rotating black holes, global symmetry and first order formalism | rotating black holes, global symmetry and first order formalism | axisymmetric holes supergravity defining them. formulate donder weyl hamilton jacobi sigma describing axisymmetric solutions. defining fields. sigma model. symmetries encoded belonging noether sigma rotating solutions. rotational extremality condition. comment extremal rotating pages latex sourc | non_dup | [] |
24765851 | 10.1007/JHEP12(2012)080 | The first two non-trivial moments of the distribution of the topological
charge (or gluonic winding number), i.e., the topological susceptibility and
the fourth cumulant, can be computed in lattice QCD simulations and exploited
to constrain the pattern of chiral symmetry breaking. We compute these two
topological observables at next-to-leading order in three-flavour Chiral
Perturbation Theory, and we discuss the role played by the eta propagation in
these expressions. For hierarchies of light-quark masses close to the physical
situation, we show that the fourth cumulant has a much better sensitivity than
the topological susceptibility to the three-flavour quark condensate, and thus
constitutes a relevant tool to determine the pattern of chiral symmetry
breaking in the limit of three massless flavours. We provide the complete
formulae for the two topological observables in the isospin limit, and predict
their values in the particular setting of the recent analysis of the RBC/UKQCD
collaboration. We show that a combination of the topological susceptibility and
the fourth cumulant is able to pin down the three-flavour condensate in a
particularly clean way in the case of three degenerate quarks.Comment: 31 pages, 7 figures. Accepted for publication in EPJ | Determining the chiral condensate from the distribution of the winding
number beyond topological susceptibility | determining the chiral condensate from the distribution of the winding number beyond topological susceptibility | trivial moments topological gluonic winding i.e. topological susceptibility fourth cumulant exploited constrain chiral breaking. topological observables flavour chiral perturbation played propagation expressions. hierarchies fourth cumulant topological susceptibility flavour condensate constitutes chiral breaking massless flavours. formulae topological observables isospin predict ukqcd collaboration. topological susceptibility fourth cumulant flavour condensate clean degenerate pages figures. publication | non_dup | [] |
2183185 | 10.1007/JHEP12(2012)082 | We introduce a new wall-crossing formula which combines and generalizes the
Cecotti-Vafa and Kontsevich-Soibelman formulas for supersymmetric 2d and 4d
systems respectively. This 2d-4d wall-crossing formula governs the
wall-crossing of BPS states in an N=2 supersymmetric 4d gauge theory coupled to
a supersymmetric surface defect. When the theory and defect are compactified on
a circle, we get a 3d theory with a supersymmetric line operator, corresponding
to a hyperholomorphic connection on a vector bundle over a hyperkahler space.
The 2d-4d wall-crossing formula can be interpreted as a smoothness condition
for this hyperholomorphic connection. We explain how the 2d-4d BPS spectrum can
be determined for 4d theories of class S, that is, for those theories obtained
by compactifying the six-dimensional (0,2) theory with a partial topological
twist on a punctured Riemann surface C. For such theories there are canonical
surface defects. We illustrate with several examples in the case of A_1
theories of class S. Finally, we indicate how our results can be used to
produce solutions to the A_1 Hitchin equations on the Riemann surface C.Comment: 170 pages, 45 figure | Wall-Crossing in Coupled 2d-4d Systems | wall-crossing in coupled 2d-4d systems | crossing combines generalizes cecotti vafa kontsevich soibelman formulas supersymmetric respectively. crossing governs crossing supersymmetric supersymmetric defect. defect compactified circle supersymmetric hyperholomorphic connection bundle hyperkahler space. crossing interpreted smoothness hyperholomorphic connection. compactifying topological twist punctured riemann canonical defects. illustrate hitchin riemann pages | non_dup | [] |
24766812 | 10.1007/JHEP12(2012)083 | We revisit the study of confining vacua in the softly broken N=2
supersymmetric QCD, in the light of some recent developments in our
understanding of the dynamics of N=2 gauge theories. These vacua are
characterized by an effective magnetic $SU(r)$ gauge group ($0\leq r\leq
N_f/2$) and are referred to sometimes as the $r$ vacua. We further clarify the
meaning of $r \leftrightarrow N_{f}-r$ duality arising from the matching of
semi-classical and quantum vacua. A particular attention is paid to certain
singular SCFT's of N=2 SQCD, driven into confinement phase by the adjoint mass
deformation $\mu\, \Phi^{2}$. In some cases they occur as a result of
coalescence of different $r$ vacua as the bare mass is tuned to a critical
value.Comment: 27 page | Singular SQCD Vacua and Confinement | singular sqcd vacua and confinement | revisit confining vacua softly broken supersymmetric developments theories. vacua referred sometimes vacua. clarify meaning leftrightarrow duality arising matching vacua. paid singular scft sqcd confinement adjoint deformation coalescence vacua bare tuned | non_dup | [] |
9325364 | 10.1007/JHEP12(2012)088 | We compute the next-to-next-to-leading order (NNLO) soft and virtual QCD
corrections for the partonic cross section of colourless-final state processes
in hadronic collisions. The results are valid to all orders in the dimensional
regularization parameter $\ep$. The dependence of the results on a particular
process is given through finite contributions to the one and two-loop
amplitudes. To evaluate the accuracy of the soft-virtual approximation we
compare it with the full NNLO result for Drell-Yan and Higgs boson production
via gluon fusion. We also provide a universal expression for the hard
coefficient needed to perform threshold resummation up to
next-to-next-to-leading logarithmic (NNLL) accuracy.Comment: 25 pages, 4 figure | A next-to-next-to-leading order calculation of soft-virtual cross
sections | a next-to-next-to-leading order calculation of soft-virtual cross sections | nnlo virtual partonic colourless hadronic collisions. valid orders regularization amplitudes. virtual nnlo drell boson gluon fusion. universal resummation logarithmic nnll pages | non_dup | [] |
9261220 | 10.1007/JHEP12(2012)089 | We study N=2 supergravity deformed by a genuine supersymmetric completion of
the $\lambda R^4$ term, using the underlying off shell N=2 superconformal
framework. The gauge-fixed superconformal model has unbroken local
supersymmetry of N=2 supergravity with higher derivative deformation.
Elimination of auxiliary fields leads to the deformation of the supersymmetry
rules as well as to the deformation of the action, which becomes a Born-Infeld
with higher derivative type action. We find that the gravitino supersymmetry
deformation starts from $\lambda \, \pa^4 {\cal F}^3$ and has higher
graviphoton couplings. In the action there are terms $\lambda^2 \pa^8 {\cal
F}^{6}$ and higher, in addition to original on shell counterterm deformation.
These deformations are absent in the on shell superspace and in the candidate
on shell counterterms of N=4,~8 supergravities, truncated down to N=2. We
conclude therefore that the undeformed on shell superspace candidate
counterterms break the N=2 part of local supersymmetry.Comment: 20 pages, 3 tables. Acknowledgments added. arXiv admin note: text
overlap with arXiv:1010.2150 by other author | N=2 Supergravity Counterterms, Off and On Shell | n=2 supergravity counterterms, off and on shell | supergravity deformed genuine supersymmetric completion lambda superconformal framework. superconformal unbroken supersymmetry supergravity deformation. elimination auxiliary deformation supersymmetry deformation born infeld action. gravitino supersymmetry deformation starts lambda graviphoton couplings. lambda counterterm deformation. deformations absent superspace candidate counterterms supergravities truncated undeformed superspace candidate counterterms break pages tables. acknowledgments added. admin overlap | non_dup | [] |
24768250 | 10.1007/JHEP12(2012)090 | We compute the correlation functions of 3 and 4 stress energy tensors $(T)$
in D=3 in free field theories of scalars, abelian gauge fields, and fermions,
which are relevant in the analysis of cosmological non-gaussianities. These
correlators appear in the holographic expressions of the scalar and tensor
perturbations derived for holographic cosmological models. The result is simply
adapted to describe the leading contributions in the gauge coupling to the same
correlators also for a non abelian SU(N) gauge theory. In the case of the
bispectrum, our results are mapped and shown to be in full agreement with the
corresponding expressions given in a recent holographic study by Bzowski,
McFadden and Skenderis. In the 4-T case we present the completely traced
amplitude plus all the contact terms. These are expected to appear in a fourth
order extension of the holographic formulas for the 4-point functions of scalar
metric perturbations.Comment: 29 pages, 3 figure | Three and Four Point Functions of Stress Energy Tensors in D=3 for the
Analysis of Cosmological Non-Gaussianities | three and four point functions of stress energy tensors in d=3 for the analysis of cosmological non-gaussianities | tensors scalars abelian fermions cosmological gaussianities. correlators holographic expressions perturbations holographic cosmological models. adapted correlators abelian theory. bispectrum mapped expressions holographic bzowski mcfadden skenderis. traced terms. fourth holographic formulas pages | non_dup | [] |
24765839 | 10.1007/JHEP12(2012)091 | We generalize Regge theory to correlation functions in conformal field
theories. This is done by exploring the analogy between Mellin amplitudes in
AdS/CFT and S-matrix elements. In the process, we develop the conformal partial
wave expansion in Mellin space, elucidating the analytic structure of the
partial amplitudes. We apply the new formalism to the case of four point
correlation functions between protected scalar operators in N=4 Super Yang
Mills, in cases where the Regge limit is controlled by the leading twist
operators associated to the pomeron-graviton Regge trajectory. At weak
coupling, we are able to predict to arbitrary high order in the 't Hooft
coupling the behaviour near J=1 of the OPE coefficients C_{OOJ} between the
external scalars and the spin J leading twist operators. At strong coupling, we
use recent results for the anomalous dimension of the leading twist operators
to improve current knowledge of the AdS graviton Regge trajectory - in
particular, determining the next and next to next leading order corrections to
the intercept. Finally, by taking the flat space limit and considering the
Virasoro-Shapiro S-matrix element, we compute the strong coupling limit of the
OPE coefficient C_{LLJ} between two Lagrangians and the leading twist operators
of spin J.Comment: 27 + 24 pages, 7 figures; v2 Typos corrected, references added; v3
Typo corrected; v4 Typos corrected, references adde | Conformal Regge theory | conformal regge theory | generalize regge conformal theories. exploring analogy mellin amplitudes elements. conformal mellin elucidating analytic amplitudes. formalism protected super mills regge twist pomeron graviton regge trajectory. predict hooft scalars twist operators. anomalous twist graviton regge trajectory determining intercept. virasoro shapiro lagrangians twist pages typos corrected typo corrected typos corrected adde | non_dup | [] |
9260349 | 10.1007/JHEP12(2012)094 | It is argued that string theory on the Euclidean version of the Schwarzschild
black hole -- the cigar geometry -- admits a zero mode that is localized at the
tip of the cigar. The presence of this mode implies that in string theory,
unlike in general relativity, the tip of the cigar is a special region. This is
in tension with the Euclidean version of the black hole complementarity
principle. We provide some qualitative arguments that link between this zero
mode and the origin of the black hole entropy and firewall at the horizon.Comment: 8 page | String Theory Versus Black Hole Complementarity | string theory versus black hole complementarity | argued euclidean schwarzschild cigar admits localized cigar. unlike relativity cigar region. tension euclidean complementarity principle. qualitative arguments firewall | non_dup | [] |
9325118 | 10.1007/JHEP12(2012)095 | Leading 't Hooft coupling corrections to the photoemission rate of the planar
limit of a strongly-coupled {\cal {N}}=4 SYM plasma are investigated using the
gauge/string duality. We consider the full order \alpha'^3 type IIB string
theory corrections to the supergravity action, including higher order terms
with the Ramond-Ramond five-form field strength. We extend our previous results
presented in arXiv:1110.0526. Photoemission rates depend on the 't Hooft
coupling, and their curves suggest an interpolating behaviour from strong
towards weak coupling regimes. Their slopes at zero light-like momentum give
the electrical conductivity as a function of the 't Hooft coupling, in full
agreement with our previous results of arXiv:1108.6306. Furthermore, we also
study the effect of corrections beyond the large N limit.Comment: 36 pages, 5 figures, paragraph added in the conclusions, references
added, typos correcte | Plasma photoemission from string theory | plasma photoemission from string theory | hooft photoemission planar duality. alpha supergravity ramond ramond strength. extend photoemission hooft interpolating regimes. slopes electrical conductivity hooft pages paragraph typos correcte | non_dup | [] |
24769311 | 10.1007/JHEP12(2012)096 | Models of neutrino mass which attempt to describe the observed lepton mixing
pattern are typically based on discrete family symmetries with a non-Abelian
and one or more Abelian factors. The latter so-called shaping symmetries are
imposed in order to yield a realistic phenomenology by forbidding unwanted
operators. Here we propose a supersymmetric model of neutrino flavor which is
based on the group T7 and does not require extra Z_N or U(1) factors, which
makes it the smallest realistic family symmetry that has been considered so
far. At leading order, the model predicts tribimaximal mixing which arises
completely accidentally from a combination of the T7 Clebsch-Gordan
coefficients and suitable flavon alignments. Next-to-leading order (NLO)
operators break the simple tribimaximal structure and render the model
compatible with the recent results of the Daya Bay and Reno collaborations
which have measured a reactor angle of around 9 degrees. Problematic NLO
deviations of the other two mixing angles can be controlled in an ultraviolet
completion of the model | A Minimal Model of Neutrino Flavor | a minimal model of neutrino flavor | attempt lepton symmetries abelian abelian factors. shaping symmetries imposed realistic phenomenology forbidding unwanted operators. propose supersymmetric flavor extra smallest realistic far. predicts tribimaximal arises accidentally clebsch gordan flavon alignments. break tribimaximal render compatible daya reno collaborations reactor degrees. problematic deviations angles ultraviolet completion | non_dup | [] |
34989689 | 10.1007/JHEP12(2012)097 | The electric dipole form factors and moments of the ground state baryons are calculated in chiral perturbation theory at next-to-leading order. We show that the baryon electric dipole form factors at this order depend only on two combinations of low-energy constants. We also derive various relations that are free of unknown low-energy constants. We use recent lattice QCD data to calculate all baryon EDMs. In particular, we find d_n = -2.9\pm 0.9 and d_p = 1.1\pm 1.1 in units of 10^{-16} e \theta_0 cm. Finite volume corrections to the moments are also worked out. We show that for a precision extraction from lattice QCD data, the next-to-leading order terms have to be accounted for | Baryon electric dipole moments from strong CP violation | baryon electric dipole moments from strong cp violation | dipole moments baryons chiral perturbation order. baryon dipole combinations constants. derive unknown constants. baryon edms. theta moments worked out. precision extraction accounted | non_dup | [] |
24771957 | 10.1007/JHEP12(2012)098 | We compute the boundary stress tensor associated with Mann-Marolf counterterm
in asymptotic flat and static spacetime for cylindrical boundary surface as $r
\rightarrow \infty$, and find that the form of the boundary stress tensor is
the same as the hyperbolic boundary case in 4 dimensions, but has additional
terms in higher than 4 dimensions. We find that these additional terms are
impotent and do not contribute to conserved charges. We also check the
conservation of the boundary stress tensor in a sense that $\mathcal{D}^a
T_{ab} = 0$, and apply our result to the ($n+3$)-dimensional static black hole
solution. As a result, we show that the stress boundary tensor with Mann-Marolf
counterterm works well in standard boundary surfaces.Comment: 27 page | Holographic Renormalization of Asymptotically Flat Gravity | holographic renormalization of asymptotically flat gravity | mann marolf counterterm asymptotic spacetime cylindrical rightarrow infty hyperbolic dimensions. impotent conserved charges. check conservation mathcal solution. mann marolf counterterm | non_dup | [] |
24765875 | 10.1007/JHEP12(2012)099 | We consider Abelian M5 brane on a six-manifold which we take as a circle
bundle over a five-manifold $M$. We compute the zero mode part of the M5 brane
partition function using Chern-Simons theory and Hamiltonian formulation
respectively and find an agreement. We also show that the D4 brane on $M$
shares exactly the same zero mode partition function again using the
Hamiltonian formulation. For the oscillator modes we find that KK modes
associated with the circle compactification are missing from the D4 brane. By
making an infinitesimal noncommutative deformation we have instanton threshold
bound states. We explicitly compute the instanton partition function up to
instanton charge three, and show a perfect match with a corresponding
contribution inside the M5 brane partition function, thus providing a very
strong supporting evidence that D4 brane is identical with M5 brane which
extends beyond the BPS sector. We comment on the modular properties of the M5
brane partition function when compactified on $T^2$ times a four-manifold. We
briefly discuss a case of a singular fibration.Comment: 55 page | M5/D4 brane partition function on a circle bundle | m5/d4 brane partition function on a circle bundle | abelian brane manifold circle bundle manifold brane partition chern simons formulation agreement. brane shares partition formulation. oscillator circle compactification missing brane. infinitesimal noncommutative deformation instanton states. explicitly instanton partition instanton perfect match brane partition supporting brane brane extends sector. comment modular brane partition compactified manifold. briefly singular | non_dup | [] |
9325030 | 10.1007/JHEP12(2012)104 | We consider the application of the DRA method to the case of several master
integrals in a given sector. We establish a connection between the homogeneous
part of dimensional recurrence and maximal unitarity cuts of the corresponding
integrals: a maximally cut master integral appears to be a solution of the
homogeneous part of the dimensional recurrence relation. This observation
allows us to make a necessary step of the DRA method, the construction of the
general solution of the homogeneous equation, which, in this case, is a coupled
system of difference equations.Comment: 17 pages, 2 figure | The Dimensional Recurrence and Analyticity Method for Multicomponent
Master Integrals: Using Unitarity Cuts to Construct Homogeneous Solutions | the dimensional recurrence and analyticity method for multicomponent master integrals: using unitarity cuts to construct homogeneous solutions | master integrals sector. establish connection homogeneous recurrence maximal unitarity cuts integrals maximally master homogeneous recurrence relation. homogeneous pages | non_dup | [] |
93242596 | 10.1007/JHEP12(2012)105 | The mass of the top quark is measured using a sample of t̄t candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at √s =7 TeV at the LHC. A total of 5174 candidate events is selected from data corresponding to an integrated luminosity of 5.0 fb-1. For each event the mass is reconstructed from a kinematic fit of the decay products to a t̄t hypothesis. The top-quark mass is determined simultaneously with the jet energy scale (JES), constrained by the known mass of the W boson in q̄q decays, to be 173.49 ± 0.43 (stat. + JES) ±0.98 (syst.) GeV. © 2012 CERN for the benefit of the CMS collaboration.The Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authorit | Measurement of the top-quark mass in t̄t events with lepton+jets final states in pp collisions at √s =7 TeV | measurement of the top-quark mass in t̄t events with lepton+jets final states in pp collisions at √s =7 tev | candidate muon jets collisions lhc. candidate luminosity reconstructed kinematic hypothesis. simultaneously constrained boson decays stat. syst. gev. cern benefit collaboration.the council turkey turkish authorit | non_dup | [] |
24764487 | 10.1007/JHEP12(2012)108 | We perform an exhaustive classification of G_2 invariant extrema of the most
general gauged N=8 supergravity in four dimensions. They comprise four branches
of Anti-de Sitter solutions labelled by a single parameter. Interestingly,
while the gauge groups vary with the parameters, the mass spectra are
invariant. One of these is a new non-supersymmetric yet stable point. Our
analysis includes the recently proposed family of SO(8) gauged supergravities
and more.Comment: 5 pages. v2: extended discussion of vector masses and gauge groups
and refs adde | All G_2 invariant critical points of maximal supergravity | all g_2 invariant critical points of maximal supergravity | exhaustive extrema gauged supergravity dimensions. comprise branches sitter labelled parameter. interestingly vary invariant. supersymmetric point. gauged supergravities pages. refs adde | non_dup | [] |
144255980 | 10.1007/JHEP12(2012)109 | We present a complete, calculable, and phenomenologically viable model of dynamical supersymmetry breaking. The model is a simple extension of the so called 3- 2 model, with gauge group SU(3) × SU(2) × GSM and the MSSM fields directly coupled to the hidden sector SU(2) vector fields. Sfermion masses are universal, thus solving the supersymmetric flavour problem, and gaugino masses are not suppressed, in fact they are predicted to be of the same order as sfermion masses. Sizeable contributions to the MSSM A-terms can be generated, depending on the size of some free couplings. As a byproduct, we show some properties of a class of models with n pairs of Higgs doublets | Simple and direct communication of dynamical supersymmetry breaking | simple and direct communication of dynamical supersymmetry breaking | calculable phenomenologically viable supersymmetry breaking. mssm hidden fields. sfermion universal solving supersymmetric flavour gaugino suppressed sfermion masses. sizeable mssm couplings. byproduct doublets | non_dup | [] |
5251450 | 10.1007/JHEP12(2012)110 | Gallium and short baseline reactor neutrino experiments indicate a
short-distance anomalous disappearance of electron antineutrinos which, if
interpreted in terms of neutrino oscillations, would lead to a sterile neutrino
mass inconsistent with standard cosmological models. This anomaly is difficult
to measure at 1 km baseline experiments because its disappearance effects are
degenerate with that of theta_13. The flux normalization independent
measurement of theta_13 at Daya Bay breaks this degeneracy, allowing an
unambiguous differentiation of 1-3 neutrino oscillations and the anomalous
disappearance at Double Chooz and RENO. The resulting anomaly is consistent
with that found at very short baselines and suggests a downward revision of
RENO's result for theta_13. A MCMC global analysis of current cosmological data
shows that a quintom cosmology is just compatible at 2 sigma with a sterile
neutrino with the right mass to reproduce the reactor anomaly and to a lesser
extent the gallium and LSND/MiniBooNE anomalies. However models in which the
sterile neutrino acquires a chameleon mass easily satisfy the cosmological
bounds and also reduce the tension between LSND and KARMEN.Comment: 21 pages, 7 figures, v2 uses RENO results from nuTURN and Daya Bay
results from Neutrino 201 | The Reactor Anomaly after Daya Bay and RENO | the reactor anomaly after daya bay and reno | gallium reactor anomalous disappearance antineutrinos interpreted oscillations sterile inconsistent cosmological models. anomaly disappearance degenerate theta normalization theta daya breaks degeneracy allowing unambiguous oscillations anomalous disappearance chooz reno. anomaly baselines downward revision reno theta mcmc cosmological quintom cosmology compatible sigma sterile reproduce reactor anomaly lesser gallium lsnd miniboone anomalies. sterile acquires chameleon satisfy cosmological bounds tension lsnd pages reno nuturn daya | non_dup | [] |
24770521 | 10.1007/JHEP12(2012)115 | In this paper we describe a formalism for generating exclusive final states
in diffractive excitation, based on the optical analogy where diffraction is
fully determined by the absorption into inelastic channels. The formalism is
based on the Good--Walker formalism for diffractive excitation, and it is
assumed that the virtual parton cascades represent the diffractive eigenstates
defined by a definite absorption amplitude. We emphasize that, although
diffractive excitation is basically a quantum-mechanical phenomenon with strong
interference effects, it is possible to calculate the different interfering
components to the amplitude in an event generator, add them and thus calculate
the reaction cross section for exclusive diffractive final states. The
formalism is implemented in the DIPSY event generator, introducing no tunable
parameters beyond what has been determined previously in studies of
non-diffractive events. Some early results from DIS and proton-proton
collisions are presented, and compared to experimental data | Exclusive final states in diffractive excitation | exclusive final states in diffractive excitation | formalism generating exclusive diffractive analogy diffraction inelastic channels. formalism walker formalism diffractive virtual parton cascades diffractive eigenstates definite amplitude. emphasize diffractive basically phenomenon interference interfering generator exclusive diffractive states. formalism implemented dipsy generator introducing tunable diffractive events. proton proton collisions | non_dup | [] |
9259963 | 10.1007/JHEP12(2012)116 | We introduce the notion of "special superpolynomials" by putting q=1 in the
formulas for reduced superpolynomials. In this way we obtain a generalization
of special HOMFLY polynomials depending on one extra parameter t. Special
HOMFLY are known to depend on representation R in especially simple way: as
|R|-th power of the fundamental ones. We show that the same dependence persists
for our special superpolynomials in the case of symmetric representations, at
least for the 2-strand torus and figure-eight knots. For antisymmetric
representations the same is true, but for t=1 and arbitrary q. It would be
interesting to find an interpolation between these two relations for arbitrary
representations, but no superpolynomails are yet available in this case.Comment: 5 page | Special colored Superpolynomials and their representation-dependence | special colored superpolynomials and their representation-dependence | notion superpolynomials putting formulas superpolynomials. generalization homfly polynomials extra homfly ones. persists superpolynomials representations strand torus eight knots. antisymmetric representations interpolation representations superpolynomails | non_dup | [] |
9327292 | 10.1007/JHEP12(2012)117 | Assuming Majorana nature of neutrinos, we re-investigate, in the light of the
recent measurement of the reactor mixing angle, the allowed ranges for the
absolute values of the elements of the neutrino mass matrix in the basis where
the charged-lepton mass matrix is diagonal. Apart from the derivation of upper
and lower bounds on the values of the matrix elements, we also study their
correlations. Moreover, we analyse the sensitivity of bounds and correlations
to the global fit results of the neutrino oscillation parameters which are
available in the literature.Comment: 37 pages, 146 figures, minor corrections, 17 additional figures,
version for publication in JHE | Correlations of the elements of the neutrino mass matrix | correlations of the elements of the neutrino mass matrix | majorana neutrinos reactor ranges lepton diagonal. apart derivation bounds correlations. analyse bounds oscillation pages minor publication | non_dup | [] |
9326207 | 10.1007/JHEP12(2012)119 | We analytically calculate higher order corrections to coefficient functions
of the operator product expansion (OPE) for the Euclidean correlator of two
energy-momentum tensors in massless QCD. These are the three-loop contribution
to the coefficient C_0 in front of the unity operator O_0=1 and the one and
two-loop contributions to the coefficient C_1 in front of the gluon
"condensate" operator O_1=-1/4 G^{\mu \nu} G_{\mu \nu}. For the correlator of
two operators O_1 we present the coefficient C_1 at two-loop level.Comment: v2: comments and appendix added, results are now available in
computer readable form; v3: JHEP version, extended discussion of the method
of projector | OPE of the energy-momentum tensor correlator in massless QCD | ope of the energy-momentum tensor correlator in massless qcd | analytically euclidean correlator tensors massless qcd. front unity front gluon condensate correlator comments readable jhep projector | non_dup | [] |
24770518 | 10.1007/JHEP12(2012)120 | Disorder has long been a difficult subject in condensed matter systems and
the The replica method is a well-known tool in this field. Implementing the
replica method the AdS/CFT correspondence has been proposed and discussed in
literatures. We point out, for any CFT that has a holographic dual and to the
leading order of the large-N expansion, the corrections due to the presence of
random disorder to any connected correlation functions vanish identically,
provided that the disorder strength is normalized as discussed in literatures
and that the symmetry among replicas is unbroken. Same must hold true to any
observables that are determined by the connected correlation functions through
a linear relation. This behavior resembles strongly that of a free theory where
disorder is coupled to the fundamental field. We demonstrate this by both the
means of holographic principle and field theory analysis in a toy model. We
also propose ways of evaluating the non-zero sub-leading effects perturbatively
in terms of the disorder strength and discuss a novel possibility of defining a
new holographic dual if we adopt a different normalization for the disorder
strength.Comment: 24 page | Correlation functions in the holographic replica method | correlation functions in the holographic replica method | disorder condensed replica field. implementing replica correspondence literatures. holographic disorder vanish identically disorder literatures replicas unbroken. hold observables relation. resembles disorder field. holographic model. propose ways evaluating perturbatively disorder defining holographic adopt normalization disorder | non_dup | [] |
24764507 | 10.1007/JHEP12(2012)123 | We present an up-to-date global analysis of solar, atmospheric, reactor, and
accelerator neutrino data in the framework of three-neutrino oscillations. We
provide results on the determination of theta_13 from global data and discuss
the dependence on the choice of reactor fluxes. We study in detail the
statistical significance of a possible deviation of theta_23 from maximal
mixing, the determination of its octant, the ordering of the mass states, and
the sensitivity to the CP violating phase, and discuss the role of various
complementary data sets in those respects.Comment: 23 pages, 7 figures. v3: final version to appear in JHEP. Updated
results will be provided at http://www.nu-fit.or | Global fit to three neutrino mixing: critical look at present precision | global fit to three neutrino mixing: critical look at present precision | reactor accelerator oscillations. theta reactor fluxes. theta maximal octant ordering violating complementary pages figures. jhep. updated www.nu fit.or | non_dup | [] |
11300871 | 10.1007/JHEP12(2012)125 | A discovery of the rare decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$ is presented. This decay is observed for the first time, with 5.2 $\sigma$ significance. The observation is made using $pp$ collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected with the LHCb detector. The measured branching fraction is (2.3 $\pm$ 0.6 (stat.) $\pm$ 0.1 (syst.))$\times 10^{-8}$, and the ratio of the $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$ and $B^{+} \rightarrow \K^{+} \mu^{+} \mu^{-}$ branching fractions is measured to be 0.053 $\pm$ 0.014 (stat.) $\pm$ 0.001 (syst.) | First observation of the decay $B^{+} \rightarrow π^{+} μ^{+} μ^{-}$ | first observation of the decay $b^{+} \rightarrow π^{+} μ^{+} μ^{-}$ | discovery rare rightarrow presented. sigma significance. collision luminosity lhcb detector. branching stat. syst. rightarrow rightarrow branching fractions stat. syst. | non_dup | [] |
24973029 | 10.1007/JHEP12(2013)001 | We define a squashed four-sphere by a dimensional reduction of a twisted S^4
x S^1, and construct explicitly a supersymmetric Yang-Mills action on it. The
action includes a non-trivial dilaton factor and a theta term with a
non-constant theta. The partition function of this theory is calculated using
the localization technique. The resulting partition function can be written in
the form consistent with the AGT relation due to the non-constant theta term.
The parameter b which characterizes the partition function in this form is not
restricted to be real for the squashed four-sphere.Comment: 35 pages, no figures. v2: typos corrected, references adde | Supersymmetric Gauge Theories on a Squashed Four-Sphere | supersymmetric gauge theories on a squashed four-sphere | squashed sphere twisted explicitly supersymmetric mills trivial dilaton theta theta. partition localization technique. partition theta term. characterizes partition restricted squashed pages figures. typos corrected adde | non_dup | [] |
24934904 | 10.1007/JHEP12(2013)002 | We discuss how chiral fermions can appear in the type IIB matrix model, which
is considered to be a nonperturbative formulation of superstring theory. In
particular, we are concerned with a constructive definition of the theory, in
which we start with a finite-N configuration and take the large-N limit later
on. We point out that there exists a certain necessary condition which the
structure of the extra dimensions should satisfy. As an example, we consider a
previous proposal using intersecting branes and show that chiral fermions can
indeed be realized in four dimensions by introducing a matrix counterpart of
warped space-time. This is remarkable in view of the well-known difficulty in
realizing chiral fermions in lattice gauge theory.Comment: 4 pages, 2 figures; (v2) analysis in section 3 improve | Realizing chiral fermions in the type IIB matrix model at finite N | realizing chiral fermions in the type iib matrix model at finite n | chiral fermions nonperturbative formulation superstring theory. concerned constructive extra satisfy. proposal intersecting branes chiral fermions realized introducing counterpart warped time. remarkable difficulty realizing chiral fermions pages | non_dup | [] |
24946717 | 10.1007/JHEP12(2013)005 | Neutrino mass sum rules relate the three neutrino masses within generic
classes of flavour models, leading to restrictions on the effective mass
parameter measured in experiments on neutrinoless double beta decay as a
function of the lightest neutrino mass. We perform a comprehensive study of the
implications of such neutrino mass sum rules, which provide a link between
model building, phenomenology, and experiments. After a careful explanation of
how to derive predictions from sum rules, we discuss a large number of examples
both numerically, using all three global fits available for the neutrino
oscillation data, and analytically wherever possible. In some cases, our
results disagree with some of those in the literature for reasons that we
explain. Finally we discuss the experimental prospects for many current and
near-future experiments, with a particular focus on the uncertainties induced
by the unknown nuclear physics involved. We find that, in many cases, the power
of the neutrino mass sum rules is so strong as to allow certain classes of
models to be tested by the next generation of neutrinoless double beta decay
experiments. Our study can serve as both a guideline and a theoretical
motivation for future experimental studies.Comment: v2: typos corrected, slight modifications, one sum rule added, one
more figur | The Power of Neutrino Mass Sum Rules for Neutrinoless Double Beta Decay
Experiments | the power of neutrino mass sum rules for neutrinoless double beta decay experiments | relate generic flavour restrictions neutrinoless beta lightest mass. comprehensive phenomenology experiments. careful explanation derive numerically fits oscillation analytically wherever possible. disagree reasons explain. prospects unknown involved. neutrinoless beta experiments. serve guideline motivation typos corrected slight modifications figur | non_dup | [] |
24948028 | 10.1007/JHEP12(2013)006 | We perform a comprehensive study of family symmetry models based on $A_4$
combined with the generalised CP symmetry $H_{\rm{CP}}$. We investigate the
lepton mixing parameters which can be obtained from the original symmetry
$A_4\rtimes H_{\rm{CP}}$ breaking to different remnant symmetries in the
neutrino and charged lepton sectors. We find that only one case is
phenomenologically viable, namely $G^{\nu}_{\rm{CP}}\cong Z^{S}_2\times
H^{\nu}_{\rm{CP}}$ in the neutrino sector and $G^{l}_{\rm{CP}}\cong
Z^{T}_3\rtimes H^{l}_{\rm{CP}}$ in the charged lepton sector, leading to the
prediction of no CP violation, namely $\delta_{CP}$ and the Majorana phases
$\alpha_{21}$ and $\alpha_{31}$ are all equal to either zero or $\pi$. We then
propose an effective supersymmetric model based on the symmetry $A_4\rtimes
H_{\rm{CP}}$ in which trimaximal lepton mixing is predicted together with
either zero CP violation or $\delta_{CP}\simeq\pm \pi/2$ with non-trivial
Majorana phases. An ultraviolet completion of the effective model yields a
neutrino mass matrix which depends on only three real parameters. As a result
of this, all three CP phases and the absolute neutrino mass scale are
determined, the atmospheric mixing angle is maximal, and the Dirac CP can
either be preserved with $\delta_{CP}=0,\pi$ or maximally broken with
$\delta_{CP}=\pm \pi /2$ and sharp predictions for the Majorana phases and
neutrinoless double beta decay.Comment: 38 pages, 3 figure | Generalised CP and $A_4$ Family Symmetry | generalised cp and $a_4$ family symmetry | comprehensive generalised lepton rtimes breaking remnant symmetries lepton sectors. phenomenologically viable cong cong rtimes lepton violation delta majorana alpha alpha propose supersymmetric rtimes trimaximal lepton violation delta simeq trivial majorana phases. ultraviolet completion parameters. maximal dirac preserved delta maximally broken delta sharp majorana neutrinoless beta pages | non_dup | [] |
24971581 | 10.1007/JHEP12(2013)007 | LHC searches for missing transverse energy in association with a jet allow to
place strong bounds on the interactions between dark matter and quarks. In this
article, we present an extension of the POWHEG BOX capable of calculating the
underlying cross sections at the next-to-leading order level. This approach
enables us to consistently include the effects of parton showering and to apply
realistic experimental cuts. We find significant differences from a fixed-order
analysis that neglects parton showering effects. In particular, next-to-leading
order corrections do not lead to a significant enhancement of the mono-jet
cross section once a veto on additional jets is imposed. Nevertheless, these
corrections reduce the theoretical uncertainties of the signal prediction and
therefore improve the reliability of the derived bounds. We present our results
in terms of simple rescaling factors, which can be directly applied to existing
experimental analyses and discuss the impact of changing experimental cuts.Comment: Added KITP affiliations, fixed 2 very minor typos, matches version
published in JHE | QCD effects in mono-jet searches for dark matter | qcd effects in mono-jet searches for dark matter | searches missing bounds quarks. powheg capable calculating level. enables consistently parton showering realistic cuts. neglects parton showering effects. enhancement mono veto jets imposed. nevertheless reliability bounds. rescaling changing kitp affiliations minor typos matches | non_dup | [] |
24973096 | 10.1007/JHEP12(2013)008 | We extend the maximal unitarity method to amplitude contributions whose cuts
define multidimensional algebraic varieties. The technique is valid to all
orders and is explicitly demonstrated at three loops in gauge theories with any
number of fermions and scalars in the adjoint representation. Deca-cuts
realized by replacement of real slice integration contours by
higher-dimensional tori encircling the global poles are used to factorize the
planar triple box onto a product of trees. We apply computational algebraic
geometry and multivariate complex analysis to derive unique projectors for all
master integral coefficients and obtain compact analytic formulae in terms of
tree-level data.Comment: 34 pages, 3 figure | Multivariate Residues and Maximal Unitarity | multivariate residues and maximal unitarity | extend maximal unitarity cuts multidimensional algebraic varieties. valid orders explicitly loops fermions scalars adjoint representation. deca cuts realized replacement slice contours tori encircling poles factorize planar triple trees. algebraic multivariate derive projectors master analytic formulae pages | non_dup | [] |
24958755 | 10.1007/JHEP12(2013)010 | Recent results from the LHC experiments, both for the Higgs mass measurement
and the direct search for supersymmetric (SUSY) particles, might indicate that
the SUSY breaking scale is much higher than the electroweak scale. Although it
is difficult to investigate such a scenario at collider experiments, the
measurement of the hadronic electric dipole moments is one of promising ways to
detect the effects of the SUSY particles. These effects are expressed in terms
of the CP-violating effective operators defined at the SUSY breaking scale,
which involve quarks, gluons, photons, and gluinos. In this paper, we discuss
the QCD corrections to the effective operators in the high-scale SUSY scenario.
To appropriately evaluate the radiative corrections in the presence of large
mass hierarchy among the SUSY particles, we exploit an effective theoretical
approach based on the renormalization-group equations. As a result, it is found
that the low-energy quark electric and chromoelectric dipole moments may differ
from those evaluated in previous works by O(100) % and O(10) %, respectively.Comment: 15 pages, 4 figures; v2: typos correcte | QCD Corrections to Quark (Chromo)Electric Dipole Moments in High-scale
Supersymmetry | qcd corrections to quark (chromo)electric dipole moments in high-scale supersymmetry | supersymmetric susy susy breaking electroweak scale. collider hadronic dipole moments promising ways detect susy particles. violating susy breaking involve quarks gluons photons gluinos. susy scenario. appropriately radiative hierarchy susy exploit renormalization equations. chromoelectric dipole moments pages typos correcte | non_dup | [] |
24962034 | 10.1007/JHEP12(2013)011 | This note is aimed at presenting a new algebraic approach to momentum-space
correlators in conformal field theory. As an illustration we present a new
Lie-algebraic method to compute frequency-space two-point functions for charged
scalar operators of CFT$_{1}$ dual to AdS$_{2}$ black hole with constant
background electric field. Our method is based on the real-time prescription of
AdS/CFT correspondence, Euclideanization of AdS$_{2}$ black hole and projective
unitary representations of the Lie algebra $\mathfrak{sl}(2,\mathbb{R}) \oplus
\mathfrak{sl}(2,\mathbb{R})$. We derive novel recurrence relations for
Euclidean CFT$_{1}$ two-point functions, which are exactly solvable and
completely determine the frequency- and charge-dependences of two-point
functions. Wick-rotating back to Lorentzian signature, we obtain retarded and
advanced CFT$_{1}$ two-point functions that are consistent with the known
results.Comment: 15 pages, 3 tikz figures; typos corrected, footnotes and references
adde | Recurrence Relations for Finite-Temperature Correlators via
AdS$_{2}$/CFT$_{1}$ | recurrence relations for finite-temperature correlators via ads$_{2}$/cft$_{1}$ | aimed presenting algebraic correlators conformal theory. illustration algebraic field. prescription correspondence euclideanization projective unitary representations mathfrak mathbb oplus mathfrak mathbb derive recurrence euclidean solvable dependences functions. wick rotating lorentzian signature retarded advanced pages tikz typos corrected footnotes adde | non_dup | [] |
24971948 | 10.1007/JHEP12(2013)013 | Radiatively-driven natural supersymmetry (RNS) potentially reconciles the Z
and Higgs boson masses close to 100 GeV with gluinos and squarks lying beyond
the TeV scale. Requiring no large cancellations at the electroweak scale in
constructing M_Z=91.2 GeV while maintaining a light Higgs scalar with m_h 125
GeV implies a sparticle mass spectrum including light higgsinos with mass
100-300 GeV, electroweak gauginos in the 300-1200 GeV range, gluinos at 1-4 TeV
and top/bottom squarks in the 1-4 TeV range (probably beyond LHC reach), while
first/second generation matter scalars can exist in the 5-30 TeV range (far
beyond LHC reach). We investigate several characteristic signals for RNS at
LHC14. Gluino pair production yields a reach up to m_{\tg} 1.7 TeV for 300
fb^{-1}. Wino pair production -- pp\to\tw_2\tz_4 and \tw_2\tw_2 -- leads to a
unique same-sign diboson (SSdB) signature accompanied by modest jet activity
from daughter higgsino decays; this signature provides the best reach up to
m_{\tg} 2.1 TeV within this framework. Wino pair production also leads to final
states with (WZ\to 3\ell)+\eslt as well as 4\ell+\eslt which give confirmatory
signals up to m_{\tg} 1.4 TeV. Directly produced light higgsinos yield a clean,
soft trilepton signature (due to very low visible energy release) which can be
visible, but only for a not-too-small a \tz_2-\tz_1 mass gap. The clean SSdB
signal -- as well as the distinctive mass shape of the dilepton mass
distribution from \tz_{2,3}\to\tz_1\ell\ell decays if this is accessible --
will mark the presence of light higgsinos which are necessary for natural SUSY.
While an e^+e^- collider operating with \sqrt{s} 600 GeV should unequivocally
reveal the predicted light higgsinos, the RNS model with m_{1/2}> 1 TeV may
elude all LHC14 search strategies even while maintaining a high degree of
electroweak naturalness.Comment: 30 pages with 26 .eps figures; updated version corrects an error that
caused the cross sections for production of unlike pairs of electroweak-inos
in Figs. 4 and 5 to be too large by a factor of 2. This error did not
propagate into the rest of the pape | Radiatively-driven natural supersymmetry at the LHC | radiatively-driven natural supersymmetry at the lhc | radiatively supersymmetry potentially reconciles boson gluinos squarks lying scale. requiring cancellations electroweak constructing maintaining sparticle higgsinos electroweak gauginos gluinos squarks probably scalars gluino wino diboson ssdb signature accompanied modest daughter higgsino decays signature framework. wino eslt eslt confirmatory tev. higgsinos clean trilepton signature visible visible gap. clean ssdb distinctive dilepton decays accessible mark higgsinos susy. collider operating sqrt unequivocally reveal higgsinos elude maintaining electroweak pages .eps updated corrects unlike electroweak inos figs. propagate pape | non_dup | [] |
24950640 | 10.1007/JHEP12(2013)014 | We study oscillations of the high energy atmospheric neutrinos in the Earth
into sterile neutrinos with the eV-scale mass. The MSW resonance and parametric
enhancement of the $\bar{\nu}_\mu\to\bar{\nu}_s$ oscillations lead to
distortion of the zenith angle distribution of the muon-track events which can
be observed by IceCube. Due to matter effect, the IceCube signal depends not
only on the mixing element $U_{\mu 4}$ relevant for LSND and MiniBooNE but also
on $U_{\tau 4}$ and the CP-violating phase $\delta_{24}$. We show that the case
with $U_{\tau 4} = \delta_{24} = 0$ leads to the weakest IceCube signal and
therefore should be used to bound $U_{\mu 4}$. We compute the zenith angle
distributions of the $\nu_\mu-$events for different energy intervals in the
range (0.1 - 10) TeV and find that inclusion of the energy information (binning
in energy) improves the sensitivity to $\nu_s$ drastically. We estimate that
with already collected (during 3 - 4 years) IceCube statistics the bound
$|U_{\mu 4}|^2 < 0.01$ ($99\%$ C.L.) can be established and the mixing required
by LSND and MiniBooNE can be excluded at $(4 - 6) \sigma$ confidence level.Comment: 30 pages, 10 figures; v3: several clarifications added, figures
added, references added, matches the version published in JHE | Restricting the LSND and MiniBooNE sterile neutrinos with the IceCube
atmospheric neutrino data | restricting the lsnd and miniboone sterile neutrinos with the icecube atmospheric neutrino data | oscillations neutrinos earth sterile neutrinos mass. parametric enhancement oscillations distortion zenith muon track icecube. icecube lsnd miniboone violating delta delta weakest icecube zenith intervals inclusion binning improves drastically. icecube c.l. lsnd miniboone excluded sigma confidence pages clarifications matches | non_dup | [] |
24933819 | 10.1007/JHEP12(2013)015 | We present a lattice QCD study of the phase shift of $I{=}2$ $\pi\pi$
scattering on the basis of two different approaches: the standard finite volume
approach by Luscher and the recently introduced HAL QCD potential method.
Quenched QCD simulations are performed on lattices with extents
$N_s{=}16,24,32,48$ and $N_t{=}128$ as well as lattice spacing
$a{\sim}0.115\,\mathrm{fm}$ and a pion mass of $m_\pi{\sim}940\,\mathrm{MeV}$.
The phase shift and the scattering length are calculated in these two methods.
In the potential method, the error is dominated by the systematic uncertainty
associated with the violation of rotational symmetry due to finite lattice
spacing. In Luscher's approach, such systematic uncertainty is difficult to be
evaluated and thus is not included in this work. A systematic uncertainty
attributed to the quenched approximation, however, is not evaluated in both
methods. In case of the potential method, the phase shift can be calculated for
arbitrary energies below the inelastic threshold. The energy dependence of the
phase shift is also obtained from Luscher's method using different volumes
and/or nonrest-frame extension of it. The results are found to agree well with
the potential method.Comment: Version 2, consistent with published versio | Phase shifts in I=2 {\pi}{\pi}-scattering from two lattice approaches | phase shifts in i=2 {\pi}{\pi}-scattering from two lattice approaches | luscher method. quenched lattices extents spacing mathrm pion mathrm methods. dominated violation rotational spacing. luscher work. attributed quenched methods. inelastic threshold. luscher volumes nonrest agree versio | non_dup | [] |
24967733 | 10.1007/JHEP12(2013)016 | We take a closer look at the gaugino masses in the context of pure gravity
mediation models/minimal split SUSY models. We see that the gaugino mass
spectrum has a richer structure in the presence of vector-like matter fields
even when they couple to the supersymmetry breaking sector only through Planck
suppressed operators. For example, the gluino mass can be much lighter than in
anomaly mediation, enhancing the detectability of the gluino at the LHC
experiments. The rich gaugino spectrum also allows new possibilities for dark
matter scenarios such as the bino-wino co-annihilation, bino-gluino
co-annihilation, or even wino-gluino co-annihilation scenarios, which affects
future collider experiments as well as dark matter search experiments.Comment: 25 pages, 5 figures, 1 table, v2 references and explanations adde | A Closer Look at Gaugino Masses in Pure Gravity Mediation Model/Minimal
Split SUSY Model | a closer look at gaugino masses in pure gravity mediation model/minimal split susy model | closer look gaugino mediation split susy models. gaugino richer couple supersymmetry breaking planck suppressed operators. gluino lighter anomaly mediation enhancing detectability gluino experiments. gaugino possibilities scenarios bino wino annihilation bino gluino annihilation wino gluino annihilation scenarios affects collider pages explanations adde | non_dup | [] |
24966368 | 10.1007/JHEP12(2013)017 | The functional renormalization group equation for projectable
Ho\v{r}ava-Lifshitz gravity is used to derive the non-perturbative beta
functions for the Newton's constant, cosmological constant and anisotropy
parameter. The resulting coupled differential equations are studied in detail
and exemplary RG trajectories are constructed numerically. The beta functions
possess a non-Gaussian fixed point and a one-parameter family of Gaussian fixed
points. One of the Gaussian fixed points corresponds to the Einstein-Hilbert
action with vanishing cosmological constant and constitutes a saddle point with
one IR-attractive direction. For RG trajectories dragged into this fixed point
at low energies diffeomorphism invariance is restored. The emergence of general
relativity from Ho\v{r}ava-Lifshitz gravity can thus be understood as a
crossover-phenomenon where the IR behavior of the theory is controlled by this
Gaussian fixed point. In particular RG trajectories with a tiny positive
cosmological constant also come with an anisotropy parameter which is
compatible with experimental constraints, providing a mechanism for the
approximate restoration of diffeomorphism invariance in the IR. The
non-Gaussian fixed point is UV-attractive in all three coupling constants. Most
likely, this fixed point is the imprint of Asymptotic Safety at the level of
Ho\v{r}ava-Lifshitz gravity.Comment: 32 pages, 6 figure | Renormalization group flow of Ho\v{r}ava-Lifshitz gravity at low
energies | renormalization group flow of ho\v{r}ava-lifshitz gravity at low energies | renormalization projectable lifshitz derive perturbative beta newton cosmological anisotropy parameter. exemplary trajectories numerically. beta possess points. einstein hilbert vanishing cosmological constitutes saddle attractive direction. trajectories dragged diffeomorphism invariance restored. emergence relativity lifshitz understood crossover phenomenon point. trajectories tiny cosmological come anisotropy compatible approximate restoration diffeomorphism invariance attractive constants. imprint asymptotic lifshitz pages | non_dup | [] |
6207217 | 10.1007/JHEP12(2013)018 | We explore supersymmetric theories in which the Higgs mass is boosted by the
non-decoupling D-terms of an extended $U(1)_X$ gauge symmetry, defined here to
be a general linear combination of hypercharge, baryon number, and lepton
number. Crucially, the gauge coupling, $g_X$, is bounded from below to
accommodate the Higgs mass, while the quarks and leptons are required by gauge
invariance to carry non-zero charge under $U(1)_X$. This induces an irreducible
rate, $\sigma$BR, for $pp \rightarrow X \rightarrow \ell\ell$ relevant to
existing and future resonance searches, and gives rise to higher dimension
operators that are stringently constrained by precision electroweak
measurements. Combined, these bounds define a maximally allowed region in the
space of observables, ($\sigma$BR, $m_X$), outside of which is excluded by
naturalness and experimental limits. If natural supersymmetry utilizes
non-decoupling D-terms, then the associated $X$ boson can only be observed
within this window, providing a model independent `litmus test' for this broad
class of scenarios at the LHC. Comparing limits, we find that current LHC
results only exclude regions in parameter space which were already disfavored
by precision electroweak data.Comment: 7 pages, 9 figure | Higgs Mass from D-Terms: a Litmus Test | higgs mass from d-terms: a litmus test | explore supersymmetric boosted decoupling hypercharge baryon lepton number. crucially accommodate quarks leptons invariance carry induces irreducible sigma rightarrow rightarrow searches stringently constrained precision electroweak measurements. bounds maximally observables sigma excluded naturalness limits. supersymmetry utilizes decoupling boson window litmus broad scenarios lhc. exclude disfavored precision electroweak pages | non_dup | [] |
24950452 | 10.1007/JHEP12(2013)019 | It was found that the canonical energy of multi-brane solutions in CSFT
constructed by the KBc algebra has a symmetry under the exchange of K=0 and
K=\infty (inversion symmetry). On the other hand, the gauge invariant
observable (GIO), which is regarded as the energy defined by the gravitational
coupling of open string, cannot count the energy from K=\infty and therefore is
not equal to the canonical energy. To resolve this discrepancy, we examine the
recent argument of Baba and Ishibashi which directly relates the two energies.
We find that the gravitational coupling which is equivalent to the canonical
energy consists of the GIO and another new term, and the whole has the
inversion symmetry.Comment: 31 pages, 6 figures. v3: Sec.3.3 improved, version to appear in JHE | Inversion Symmetry of Gravitational Coupling in Cubic String Field
Theory | inversion symmetry of gravitational coupling in cubic string field theory | canonical brane csft infty inversion observable regarded gravitational count infty canonical energy. resolve discrepancy examine argument baba ishibashi relates energies. gravitational canonical inversion pages figures. sec. | non_dup | [] |
24932648 | 10.1007/JHEP12(2013)020 | We derive a general relation between the ground state entanglement
Hamiltonian and the physical stress tensor within the path integral formalism.
For spherical entangling surfaces in a CFT, we reproduce the \emph{local}
ground state entanglement Hamiltonian derived by Casini, Huerta and Myers. The
resulting reduced density matrix can be characterized by a spatially varying
"entanglement temperature." Using the entanglement Hamiltonian, we calculate
the first order change in the entanglement entropy due to changes in conserved
charges of the ground state, and find a local first law-like relation for the
entanglement entropy. Our approach provides a field theory derivation and
generalization of recent results obtained by holographic techniques. However,
we note a discrepancy between our field theoretically derived results for the
entanglement entropy of excited states with a non-uniform energy density and
current holographic results in the literature. Finally, we give a CFT
derivation of a set of constraint equations obeyed by the entanglement entropy
of excited states in any dimension. Previously, these equations were derived in
the context of holography.Comment: 17 pages, 3 figures. Typo fixed in eq. (III.12) and constraint
equation (VI.18) added generalizing previous result to higher dimensions.Some
references adde | Entanglement Temperature and Entanglement Entropy of Excited States | entanglement temperature and entanglement entropy of excited states | derive entanglement formalism. spherical entangling reproduce emph entanglement casini huerta myers. spatially entanglement temperature. entanglement entanglement conserved charges entanglement entropy. derivation generalization holographic techniques. discrepancy theoretically entanglement excited holographic literature. derivation obeyed entanglement excited dimension. pages figures. typo iii. generalizing dimensions.some adde | non_dup | [] |
24961256 | 10.1007/JHEP12(2013)021 | We present a new family of asymptotically AdS four-dimensional black hole
solutions with scalar hair of a gravitating system consisting of a scalar field
minimally coupled to gravity with a self-interacting potential. For a certain
profile of the scalar field we solve the Einstein equations and we determine
the scalar potential. Thermodynamically we show that there is a critical
temperature below which there is a phase transition of a black hole with
hyperbolic horizon to the new hairy black hole configuration.Comment: Version accepted for publication in JHE | Four-Dimensional Asymptotically AdS Black Holes with Scalar Hair | four-dimensional asymptotically ads black holes with scalar hair | asymptotically hair gravitating consisting minimally interacting potential. solve einstein potential. thermodynamically hyperbolic horizon hairy publication | non_dup | [] |
24944193 | 10.1007/JHEP12(2013)022 | We explore supersymmetric quantum quenches of the mass and coupling constants
in the $\mathcal{N}=1$ supersymmetric vector model using Hartee-Fock
approximation. We find that in the case of the free fermionic field, quench of
the mass generates singularity localized at the instant of sudden change and we
point out the essential role of the parity of spacetime. Focusing on a
supersymmetric generalization of the $\phi^6$ model and using stationary phase
approximation, we demonstrate that supersymmetry is broken in the asymptotic
state that emerges at late times after the quench. Finally, we confirm SUSY
breaking in the time-dependent setting by integrating numerically the exact
equations of motion from the instant of the quench into asymptotic regime. We
argue that the breaking of supersymmetry cannot be attributed to the thermal
physics since to leading order in the Hartee-Fock approximation the final state
is not thermal.Comment: 23 pages, 4 figure | (Non) supersymmetric quantum quenches | (non) supersymmetric quantum quenches | explore supersymmetric quenches mathcal supersymmetric hartee fock approximation. fermionic quench generates singularity localized instant sudden parity spacetime. focusing supersymmetric generalization stationary supersymmetry broken asymptotic emerges quench. confirm susy breaking integrating numerically instant quench asymptotic regime. argue breaking supersymmetry attributed hartee fock pages | non_dup | [] |
24954184 | 10.1007/JHEP12(2013)023 | We study quantum cosmological models for certain classes of bang/crunch
singularities, using the duality between expanding bubbles in AdS with a FRW
interior cosmology and perturbed CFTs on de Sitter space-time. It is pointed
out that horizon complementarity in the AdS bulk geometries is realized as a
conformal transformation in the dual deformed CFT. The quantum version of this
map is described in full detail in a toy model involving conformal quantum
mechanics. In this system the complementarity map acts as an exact duality
between eternal and apocalyptic Hamiltonian evolutions. We calculate the
commutation relation between the Hamiltonians corresponding to the different
frames. It vanishes only on scale invariant states.Comment: 38 pages, 9 figure | Conformal Complementarity Maps | conformal complementarity maps | cosmological bang crunch singularities duality expanding bubbles interior cosmology perturbed cfts sitter time. pointed horizon complementarity geometries realized conformal deformed cft. involving conformal mechanics. complementarity acts duality eternal apocalyptic evolutions. commutation hamiltonians frames. vanishes pages | non_dup | [] |
24971195 | 10.1007/JHEP12(2013)026 | We determine the most general form of the covariant drag force exerted on a
quark moving through a fluid dynamical flow. Up to first order in derivative
expansion, our general formula requires the specification of seven coefficient
functions. We use the perturbative method introduced in arXiv:1202.2737 and
find all these coefficients in the hydrodynamic regime of a $\mathcal{N}=4$ SYM
plasma. Having this general formula, we can obtain the rate of the energy and
momentum loss of a quark, namely the drag force, in a general flow. This result
makes it possible to perturbatively study the motion of heavy quarks moving
through the Bjorken flow up to first order in derivative expansion.Comment: 28 pages, v2: typos corrected, v3: Note added + Some corrections in
the expression of F^ | The Energy Loss of a Heavy Quark Moving Through a General Fluid
Dynamical Flow | the energy loss of a heavy quark moving through a general fluid dynamical flow | covariant drag exerted moving flow. specification seven functions. perturbative hydrodynamic mathcal plasma. drag flow. perturbatively quarks moving bjorken pages typos corrected | non_dup | [] |
24971500 | 10.1007/JHEP12(2013)027 | We reconsider black hole solutions of D = 3 higher-spin gravity in the
$hs[\lambda]\oplus hs[\lambda]$ Chern-Simons formulation. A suitable
generalisation of the BTZ black hole has a spin-3 chemical potential $\alpha$,
and non-zero values of all the conserved charges associated with the asymptotic
$\mathcal W_\infty[\lambda]$ symmetry. We extend the available perturbative
expansion of the partition function to order $\mathcal O(\alpha^{18})$ for
generic values of the $\lambda$ parameter. The result matches the CFT
prediction at $\lambda=0$ and at $\lambda=1$ where we provide the exact
all-order expansion of the partition function. The perturbative series is then
analysed in the interesting non-trivial limit $\lambda\to\infty$ and we derive
the exact analytical expressions of the partition function and the spin-4
charge in closed form as functions of $\alpha$. Also, the first subleading
correction at large $\lambda$ is shown to be simply related to the leading
contribution.Comment: 15 pages, 4 figures. v2: more comments and reference | On the partition functions of higher spin black holes | on the partition functions of higher spin black holes | reconsider lambda oplus lambda chern simons formulation. generalisation alpha conserved charges asymptotic mathcal infty lambda symmetry. extend perturbative partition mathcal alpha generic lambda parameter. matches lambda lambda partition function. perturbative analysed trivial lambda infty derive expressions partition alpha subleading lambda pages figures. comments | non_dup | [] |
24951496 | 10.1007/JHEP12(2013)028 | Heavy Majorana neutrinos enter in many scenarios of physics beyond the
Standard Model: in the original seesaw mechanism they provide a natural
explanation for the small masses of the Standard Model neutrinos and in the
simplest leptogenesis framework they are at the origin of the baryonic matter
of the universe. In this paper, we develop an effective field theory for
non-relativistic Majorana particles, which is analogous to the heavy-quark
effective theory. Then, we apply it to the case of a heavy Majorana neutrino
decaying in a hot and dense plasma of Standard Model particles, whose
temperature is much smaller than the mass of the Majorana neutrino but still
much larger than the electroweak scale. The neutrino width gets
zero-temperature contributions that can be computed from in-vacuum matrix
elements, and thermal corrections. Only the latter will be addressed. Symmetry
and power counting arguments made manifest by the effective field theory
restrict the form of the thermal corrections and simplify their calculation.
The final result agrees with recent determinations obtained with different
methods. The effective field theory presented here is suitable to be used for a
variety of different models involving non-relativistic Majorana fermions.Comment: Published version. 25 pages, 7 figures, references adde | An effective field theory for non-relativistic Majorana neutrinos | an effective field theory for non-relativistic majorana neutrinos | majorana neutrinos enter scenarios seesaw explanation neutrinos simplest leptogenesis baryonic universe. relativistic majorana analogous theory. majorana decaying dense majorana electroweak scale. gets corrections. addressed. counting arguments manifest restrict simplify calculation. agrees determinations methods. involving relativistic majorana version. pages adde | non_dup | [] |
24956356 | 10.1007/JHEP12(2013)029 | Generic c=1 four-point conformal blocks on the Riemann sphere can be seen as
the coefficients of Fourier expansion of the tau function of Painlev\'e VI
equation with respect to one of its integration constants. Based on this
relation, we show that c=1 fusion matrix essentially coincides with the
connection coefficient relating tau function asymptotics at different critical
points. Explicit formulas for both quantities are obtained by solving certain
functional relations which follow from the tau function expansions. The final
result does not involve integration and is given by a ratio of two products of
Barnes G-functions with arguments expressed in terms of conformal
dimensions/monodromy data. It turns out to be closely related to the volume of
hyperbolic tetrahedron.Comment: 26 pages, 4 figure | Painlev\'e VI connection problem and monodromy of c=1 conformal blocks | painlev\'e vi connection problem and monodromy of c=1 conformal blocks | generic conformal blocks riemann sphere fourier painlev constants. fusion essentially coincides connection relating asymptotics points. formulas quantities solving expansions. involve barnes arguments conformal monodromy data. turns closely hyperbolic pages | non_dup | [] |
24963870 | 10.1007/JHEP12(2013)031 | We generalize our analysis in [arXiv:1301.1977], and show that a 5d and 6d
AGT correspondence for SU(N) -- which essentially relates the relevant 5d and
6d Nekrasov instanton partition functions to the integrable representations of
a q-deformed and elliptic affine W_N-algebra -- can be derived, purely
physically, from the principle that the spacetime BPS spectra of string-dual
M-theory compactifications ought to be equivalent. Via an appropriate defect,
we also derive a "fully-ramified" version of the 5d and 6d AGT correspondence
where integrable representations of a quantum and elliptic affine SU(N)-algebra
at the critical level appear on the 2d side, and argue that the relevant
"fully-ramified" 5d and 6d Nekrasov instanton partition functions are
simultaneous eigenfunctions of commuting operators which define relativistic
and elliptized integrable systems. As an offshoot, we also obtain various
mathematically novel and interesting relations involving the double loop
algebra of SU(N), elliptic Macdonald operators, equivariant elliptic genus of
instanton moduli space, and more.Comment: 53 pages (inclusive of essential review material from
arXiv:1301.1977). Minor change in (3.22 | An M-Theoretic Derivation of a 5d and 6d AGT Correspondence, and
Relativistic and Elliptized Integrable Systems | an m-theoretic derivation of a 5d and 6d agt correspondence, and relativistic and elliptized integrable systems | generalize correspondence essentially relates nekrasov instanton partition integrable representations deformed elliptic affine purely physically spacetime compactifications ought equivalent. defect derive ramified correspondence integrable representations elliptic affine argue ramified nekrasov instanton partition simultaneous eigenfunctions commuting relativistic elliptized integrable systems. offshoot mathematically involving elliptic macdonald equivariant elliptic genus instanton moduli pages inclusive minor | non_dup | [] |
24961672 | 10.1007/JHEP12(2013)032 | Type IIB toroidal orientifolds are among the earliest examples of flux vacua.
By applying T-duality, we construct the first examples of massive IIA flux
vacua with Minkowski space-times, along with new examples of type IIA flux
vacua. The backgrounds are surprisingly simple with no four-form flux at all.
They serve as illustrations of the ingredients needed to build type IIA and
massive IIA solutions with scale separation. To check that these backgrounds
are actually solutions, we formulate the complete set of type II supergravity
equations of motion in a very useful form that treats the R-R fields
democratically.Comment: 38 pages, LaTeX; references updated; additional minor comments added;
published versio | New Examples of Flux Vacua | new examples of flux vacua | toroidal orientifolds earliest vacua. duality massive vacua minkowski vacua. backgrounds surprisingly all. serve illustrations ingredients build massive separation. check backgrounds formulate supergravity treats pages latex updated minor comments versio | non_dup | [] |
24963548 | 10.1007/JHEP12(2013)033 | We construct a holographic dual to the three-dimensional ABJM Chern-Simons
matter theory with unquenched massive flavors. The flavor degrees of freedom
are introduced by means of D6-branes extended along the gauge theory directions
and delocalized in the internal space. To find the solution we have to solve
the supergravity equations of motion with the source terms introduced by the
D6-branes. The background we get is a running solution representing the
renormalization group flow between two fixed points, at the IR and the UV, in
both of which the geometry is of the form AdS_4 x M_6, where M_6 is a
six-dimensional compact manifold. Along the flow, N=1 supersymmetry is
preserved and the flavor group is Abelian. The flow is generated by changing
the quark mass m_q. When m_q is very large we recover the original unflavored
ABJM solution, while for m_q very small our solution becomes asymptotically
equivalent to the one found recently for massless smeared flavors. We study the
effects of the dynamical quarks as their mass is varied on different
observables, such as the holographic entanglement entropy, the quark-antiquark
potential, the two-point functions of high dimension bulk operators, and the
mass spectrum of mesons.Comment: 44 pages plus appendices, 11 figures;v2: minor corrections,
references adde | Unquenched massive flavors and flows in Chern-Simons matter theories | unquenched massive flavors and flows in chern-simons matter theories | holographic abjm chern simons unquenched massive flavors. flavor freedom branes directions delocalized space. solve supergravity branes. running representing renormalization manifold. supersymmetry preserved flavor abelian. changing recover unflavored abjm asymptotically massless smeared flavors. quarks varied observables holographic entanglement antiquark pages appendices minor adde | non_dup | [] |
24945319 | 10.1007/JHEP12(2013)034 | Motivated by recent progress in the study of supersymmetric gauge theories we
propose a very compact formulation of spectral duality between XXZ spin chains.
The action of the quantum duality is given by the Fourier transform in the
spectral parameter. We investigate the duality in various limits and, in
particular, prove it for q-->1, i.e. when it reduces to the XXX/Gaudin duality.
We also show that the universal difference operators are given by the normal
ordering of the classical spectral curves.Comment: 9 pages, minor corrections, reference adde | Spectral dualities in XXZ spin chains and five dimensional gauge
theories | spectral dualities in xxz spin chains and five dimensional gauge theories | motivated progress supersymmetric propose formulation duality chains. duality fourier transform parameter. duality i.e. reduces gaudin duality. universal ordering pages minor adde | non_dup | [] |
24931786 | 10.1007/JHEP12(2013)035 | We study 5d N=2 maximally supersymmetric Yang-Mills theory with a gauge group
G on S^2 x M_3, where M_3 is a 3-manifold. By explicit localization computation
we show that the path-integral of the 5d N=2 theory reduces to that of the 3d
G_C Chern-Simons theory on M_3, where G_C is the complexification of G. This
gives a direct derivation of the appearance of the Chern-Simons theory from the
compactification of the 6d (2,0) theory, confirms the predictions from the
3d/3d correspondence for G=SU(N), and suggests the generalization of the
correspondence to more general gauge groups.Comment: 28 pages, minor corrections and references added, comments on the
gauge-fixing added. The version published in JHE | 3d Chern-Simons Theory from M5-branes | 3d chern-simons theory from m5-branes | maximally supersymmetric mills manifold. localization reduces chern simons complexification derivation appearance chern simons compactification confirms correspondence generalization correspondence pages minor comments fixing added. | non_dup | [] |
24961193 | 10.1007/JHEP12(2013)036 | We study a holographic model with vector condensate by coupling the anti-de
Sitter gravity to an Abelian gauge field and a charged vector field in $(3+1)$
dimensional spacetime. In this model there exists a non-minimal coupling of the
vector filed to the gauge field. We find that there is a critical temperature
below which the charged vector condenses via a second order phase transition.
The DC conductivity becomes infinite and the AC conductivity develops a gap in
the condensed phase. We study the effect of a background magnetic field on the
system. It is found that the background magnetic field can induce the
condensate of the vector field even in the case without chemical
potential/charge density. In the case with non-vanishing charge density, the
transition temperature raises with the applied magnetic field, and the
condensate of the charged vector operator forms a vortex lattice structure in
the spatial directions perpendicular to the magnetic field.Comment: v3: minor changes, references added, to appear in JHE | A Holographic Study on Vector Condensate Induced by a Magnetic Field | a holographic study on vector condensate induced by a magnetic field | holographic condensate sitter abelian spacetime. filed field. condenses transition. conductivity infinite conductivity develops condensed phase. system. induce condensate density. vanishing raises condensate vortex directions perpendicular minor | non_dup | [] |
24948409 | 10.1007/JHEP12(2013)037 | We consider gauge coupling unification in E6 F-Theory Grand Unified Theories
(GUTs) where E6 is broken to the Standard Model (SM) gauge group using fluxes.
In such models there are two types of exotics that can affect gauge coupling
unification, namely matter exotics from the matter curves in the 27 dimensional
representation of E6 and the bulk exotics from the adjoint 78 dimensional
representation of E6. We explore the conditions required for either the
complete or partial removal of bulk exotics from the low energy spectrum. In
the latter case we shall show that (miraculously) gauge coupling unification
may be possible even if there are bulk exotics at the TeV scale. Indeed in some
cases it is necessary for bulk exotics to survive to the TeV scale in order to
cancel the effects coming from other TeV scale matter exotics which would by
themselves spoil gauge coupling unification. The combination of matter and bulk
exotics in these cases can lead to precise gauge coupling unification which
would not be possible with either type of exotics considered by themselves. The
combination of matter and bulk exotics at the TeV scale represents a unique and
striking signature of E6 F-theory GUTs that can be tested at the LHC.Comment: 21 pages, 5 figure | Gauge Coupling Unification in E6 F-Theory GUTs with Matter and Bulk
Exotics from Flux Breaking | gauge coupling unification in e6 f-theory guts with matter and bulk exotics from flux breaking | unification grand unified guts broken fluxes. exotics unification exotics exotics adjoint explore removal exotics spectrum. miraculously unification exotics scale. exotics survive cancel coming exotics spoil unification. exotics precise unification exotics themselves. exotics striking signature guts pages | non_dup | [] |
24966589 | 10.1007/JHEP12(2013)040 | We study three types of the old-minimal higher-derivative supergravity
theories extending the $f(R)$ gravity, towards their use for the inflationary
model building in supergravity, by using both superfields and their field
components. In the curved superspace all those theories are described in terms
of a single chiral scalar curvature superfeld $\mathcal{R}$. Each of those
theories can be dualized into a matter-coupled supergravity without higher
derivatives. The first type is parametrized by a single non-holomorphic
potential $N(\mathcal{R},\bar{\mathcal{R}})$, and gives rise to the dual
matter-coupled supergravities with two dynamical chiral matter superfields
having a no-scale K\"ahler potential. We find that a generic potential
$N(\mathcal{R},\bar{\mathcal{R}})$ generates both the $(R+R^2)$ gravity and the
non-minimal coupling of the propagating complex scalar field to the $R$, needed
for the Starobinsky and Higgs inflation, respectively. We find the general
conditions for the Starobinsky inflation and compute the inflaton mass. The
second type is given by the chiral supergravity actions whose superfield
Lagrangian $F(\mathcal{R},\Sigma({\bar{\mathcal R}}))$ also depends upon the
chiral projection $\Sigma$ of the anti-chiral superfield ${\bar{\mathcal R}}$.
We find that the actions of the second type always give rise to ghosts. We also
revisit the $F(\mathcal{R})$ supergravity actions of the third type (without
the $\Sigma$-dependence) with the reduced number of the extra physical degrees
of freedom, comprising a single chiral matter superfeld with a no-scale
K\"ahler potential. We confirm that the pure $F(\mathcal{R})$ supergravity is
insufficient for realization of the Starobinsky inflation, though by the reason
different from those proposed in the recent literature.Comment: LaTeX, 24 pages, no pictures; Sections 3 and 4 expanded, references
added, typos correcte | Old-minimal supergravity models of inflation | old-minimal supergravity models of inflation | supergravity extending inflationary supergravity superfields components. curved superspace chiral curvature superfeld mathcal dualized supergravity derivatives. parametrized holomorphic mathcal mathcal supergravities chiral superfields ahler potential. generic mathcal mathcal generates propagating starobinsky inflation respectively. starobinsky inflation inflaton mass. chiral supergravity superfield lagrangian mathcal sigma mathcal chiral projection sigma chiral superfield mathcal ghosts. revisit mathcal supergravity sigma extra freedom comprising chiral superfeld ahler potential. confirm mathcal supergravity insufficient realization starobinsky inflation latex pages pictures expanded typos correcte | non_dup | [] |
24938360 | 10.1007/JHEP12(2013)041 | Using D3/D(-1) brane set-up in type IIB string theory we introduce
gauge-stringy instantons in N=2 U(N) supersymmetry theories with one matter
multiplet in symmetric representation. In addition to the gauge and stringy
moduli there exist extra zero modes that we refer to as "gauge-stringy" moduli.
We show that the measure of the moduli space in this model becomes
dimensionless for arbitary N when the gauge instanton charge k_g is equal to
the stringy instanton charge k_s. This property of gauge-stringy instantons
leads to having equal contributions from all instanton charges k_s=k_g=k in the
effective action. We derive the gauge-stringy instanton partition function and
calculate the corrections to the prepotential due to k=1,2 gauge-stringy
instanton charges. As a by-product the partition function for gauge k-instanton
is obtained which coincides with the result from the standard ADHM
construction.Comment: 4 references added, A paragraph added in Conclusions, To appear in
JHE | Gauge-Stringy Instantons in N=2 U(N) Gauge Theories | gauge-stringy instantons in n=2 u(n) gauge theories | brane stringy instantons supersymmetry multiplet representation. stringy moduli extra stringy moduli. moduli dimensionless arbitary instanton stringy instanton stringy instantons instanton charges action. derive stringy instanton partition prepotential stringy instanton charges. partition instanton coincides adhm paragraph | non_dup | [] |
24970038 | 10.1007/JHEP12(2013)042 | First order phase transitions are characterized by the nucleation and
evolution of bubbles. The dynamics of cosmological vacuum bubbles, where the
order parameter is independent of other degrees of freedom, are well known;
more realistic phase transitions in which the order parameter interacts with
the other constituents of the Universe is in its infancy. Here we present
high-resolution lattice simulations that explore the dynamics of bubble
evolution in which the order parameter is coupled to a relativistic fluid. We
use a generic, toy potential, that can mimic physics from the GUT scale to the
electroweak scale.Comment: 9 Pages, 4 Figure | Vacuum Bubbles in the Presence of a Relativistic Fluid | vacuum bubbles in the presence of a relativistic fluid | nucleation bubbles. cosmological bubbles freedom realistic interacts constituents universe infancy. explore bubble relativistic fluid. generic mimic electroweak pages | non_dup | [] |
24968654 | 10.1007/JHEP12(2013)043 | We present the calculation of next-to-leading-order electroweak corrections
to W-boson pair production at the LHC, taking off-shell effects of the W bosons
and their leptonic decays into account in the framework of the so-called
double-pole approximation. In detail, the lowest-order cross section and the
photonic bremsstrahlung are based on full matrix elements with four-fermion
final states, but the virtual one-loop corrections are approximated by the
leading contributions of a systematic expansion about the resonance poles of
the two W bosons. This expansion classifies the virtual corrections into
factorizable and non-factorizable corrections, the calculation of which is
described in detail. Corrections induced by photons in the initial state, i.e.
photon-photon and quark-photon collision channels, are included and based on
complete matrix elements as well. Our numerical results, which are presented
for realistic acceptance cuts applied to the W-boson decay products,
qualitatively confirm recent results obtained for on-shell W bosons and reveal
electroweak corrections of the size of tens of percent in the TeV range of
transverse momenta and invariant masses. In general, photon-photon and
quark-photon induced contributions amount to 5-10% of the full differential
result. Compared to previous predictions based on stable W bosons electroweak
corrections, however, can change by several percent because of realistic cuts
on the W-boson decay products and corrections to the decays.Comment: 35 pages, 10 figure | Next-to-leading order electroweak corrections to pp -> W+W- -> 4 leptons
at the LHC in double-pole approximation | next-to-leading order electroweak corrections to pp -> w+w- -> 4 leptons at the lhc in double-pole approximation | electroweak boson bosons leptonic decays pole approximation. photonic bremsstrahlung fermion virtual approximated poles bosons. classifies virtual factorizable factorizable detail. photons i.e. collision well. realistic acceptance cuts boson qualitatively confirm bosons reveal electroweak tens percent momenta masses. result. bosons electroweak percent realistic cuts boson pages | non_dup | [] |
24968141 | 10.1007/JHEP12(2013)045 | We compute the planar part of the two-loop five gluon amplitude with all
helicities positive. To perform the calculation we develop a D-dimensional
generalized unitarity procedure allowing us to reconstruct the amplitude by
cutting into products of six-dimensional trees. We find a compact form for the
integrand which only requires topologies with six or more propagators. We
perform cross checks of the universal infra-red structure using numerical
integration techniques.Comment: 31 pages, 7 figures. version 2 - fix typos and match with journal
versio | A Two-Loop Five-Gluon Helicity Amplitude in QCD | a two-loop five-gluon helicity amplitude in qcd | planar gluon helicities positive. unitarity allowing reconstruct cutting trees. integrand topologies propagators. checks universal infra pages figures. typos match versio | non_dup | [] |
24970216 | 10.1007/JHEP12(2013)046 | We study the partition function of the three-dimensional N=6 U(N)_k x
U(N+M)_{-k} superconformal Chern-Simons matter theory known as the ABJ theory.
We prove that the ABJ partition function on S^3 is exactly the same as a
formula recently proposed by Awata, Hirano and Shigemori. While this formula
was previously obtained by an analytic continuation from the L(2,1) lens space
matrix model, we directly derive this by using a generalization of the Cauchy
determinant identity. We also give an interpretation for the formula from brane
picture.Comment: 12 pages, no figure; v2: minor corrections, references added; v3:
typos correcte | Direct derivation of "mirror" ABJ partition function | direct derivation of "mirror" abj partition function | partition superconformal chern simons theory. partition awata hirano shigemori. analytic continuation lens derive generalization cauchy determinant identity. brane pages minor typos correcte | non_dup | [] |
24963457 | 10.1007/JHEP12(2013)048 | We indicate how to introduce chemical potentials for higher spin charges in
higher spin anti-de Sitter gravity in a manner that manifestly preserves the
original asymptotic W-symmetry. This is done by switching on a non-vanishing
component of the connection along the temporal (thermal) circles. We first
recall the procedure in the pure gravity case (no higher spin) where the only
"chemical potentials" are the temperature and the chemical potential associated
with the angular momentum. We then generalize to the higher spin case. We find
that there is no tension with the W(N) or W(infinity) asymptotic algebra, which
is obviously unchanged by the introduction of the chemical potentials. Our
argument is non-perturbative.Comment: Minor misprints correcte | Chemical potentials in three-dimensional higher spin anti-de Sitter
gravity | chemical potentials in three-dimensional higher spin anti-de sitter gravity | potentials charges sitter manner manifestly preserves asymptotic symmetry. switching vanishing connection circles. potentials momentum. generalize case. tension infinity asymptotic obviously unchanged potentials. argument minor misprints correcte | non_dup | [] |
24954539 | 10.1007/JHEP12(2013)049 | We present the three-loop remainder function, which describes the scattering
of six gluons in the maximally-helicity-violating configuration in planar N=4
super-Yang-Mills theory, as a function of the three dual conformal cross
ratios. The result can be expressed in terms of multiple Goncharov
polylogarithms. We also employ a more restricted class of "hexagon functions"
which have the correct branch cuts and certain other restrictions on their
symbols. We classify all the hexagon functions through transcendental weight
five, using the coproduct for their Hopf algebra iteratively, which amounts to
a set of first-order differential equations. The three-loop remainder function
is a particular weight-six hexagon function, whose symbol was determined
previously. The differential equations can be integrated numerically for
generic values of the cross ratios, or analytically in certain kinematics
limits, including the near-collinear and multi-Regge limits. These limits allow
us to impose constraints from the operator product expansion and multi-Regge
factorization directly at the function level, and thereby to fix uniquely a set
of Riemann-zeta-valued constants that could not be fixed at the level of the
symbol. The near-collinear limits agree precisely with recent predictions by
Basso, Sever and Vieira based on integrability. The multi-Regge limits agree
with the factorization formula of Fadin and Lipatov, and determine three
constants entering the impact factor at this order. We plot the three-loop
remainder function for various slices of the Euclidean region of positive cross
ratios, and compare it to the two-loop one. For large ranges of the cross
ratios, the ratio of the three-loop to the two-loop remainder function is
relatively constant, and close to -7.Comment: 103 pages, 12 figures, 9 ancillary files. v2: typos corrected,
references adde | Hexagon functions and the three-loop remainder function | hexagon functions and the three-loop remainder function | remainder describes gluons maximally helicity violating planar super mills conformal ratios. goncharov polylogarithms. employ restricted hexagon branch cuts restrictions symbols. classify hexagon transcendental coproduct hopf iteratively amounts equations. remainder hexagon symbol previously. numerically generic analytically kinematics collinear regge limits. impose regge factorization thereby uniquely riemann zeta valued symbol. collinear agree precisely basso sever vieira integrability. regge agree factorization fadin lipatov entering order. remainder slices euclidean one. ranges remainder pages ancillary files. typos corrected adde | non_dup | [] |
24939513 | 10.1007/JHEP12(2013)050 | We consider Renyi entropies of conformal field theories in flat space, with
the entangling surface being a sphere. The AdS/CFT correspondence relates this
Renyi entropy to that of a black hole with hyperbolic horizon; as the Renyi
parameter $n$ increases the temperature of the black hole decreases. If the CFT
possesses a sufficiently low dimension scalar operator the black hole will be
unstable to the development of hair. Thus, as $n$ is varied, the Renyi
entropies will exhibit a phase transition at a critical value of $n$. The
location of the phase transition, along with the spectrum of the reduced
density matrix $\rho$, depends on the dimension of the lowest dimension
non-trivial scalar operator in the theory.Comment: 21 pages, 7 figures, v3 - References added. Neumann boundary
conditions added in section | Holographic Phases of Renyi Entropies | holographic phases of renyi entropies | renyi entropies conformal entangling sphere. correspondence relates renyi hyperbolic horizon renyi decreases. possesses sufficiently unstable hair. varied renyi entropies exhibit trivial pages added. neumann | non_dup | [] |
24963724 | 10.1007/JHEP12(2013)051 | We consider universal aspects of a holographic Schwinger effect in general
backgrounds with an external homogeneous electric field. The argument is based
on the potential analysis developed in our previous work. Under some
conditions, there always exists a critical electric field, above which the
potential barrier vanishes and the system becomes unstable catastrophically.
The critical value agrees with the one obtained from the Dirac-Born-Infeld
action. For general confining backgrounds, we show that the Schwinger effect
does not occur when the electric field is weaker than the confining string
tension.Comment: 17 pages, v2:accepted versio | Universal aspects of holographic Schwinger effect in general backgrounds | universal aspects of holographic schwinger effect in general backgrounds | universal holographic schwinger backgrounds homogeneous field. argument work. barrier vanishes unstable catastrophically. agrees dirac born infeld action. confining backgrounds schwinger weaker confining pages versio | non_dup | [] |
24954449 | 10.1007/JHEP12(2013)052 | In this work we investigate medium modifications to the interference pattern
between initial and final state radiation. We compute single gluon production
off a highly energetic parton that undergoes a hard scattering and subsequently
crosses a dense QCD medium of finite size. We extend our previous studies
obtained at first order in opacity by providing general results for multiple
soft scatterings and their specific formulation within the harmonic oscillator
approximation. We show that there is a gradual onset of decoherence between the
initial and final state radiation due to multiple scatterings, that opens the
phase space for large angle emissions. By examining the multiplicity of
produced gluons, we observe a potentially large double logarithmic enhancement
for dense media and small opening angles. This result points to a possible
modification of the evolution equations due to a QCD medium of finite size. We
briefly comment on the phenomenological consequences of this setup in
high-energy nuclear collisions.Comment: 33 pages, 2 figures. Fix typos and updated references. Discussion in
the introduction updated. Accepted for publication in JHE | Coherence phenomena between initial and final state radiation in a dense
QCD medium | coherence phenomena between initial and final state radiation in a dense qcd medium | modifications interference radiation. gluon energetic parton undergoes subsequently crosses dense size. extend opacity scatterings formulation harmonic oscillator approximation. gradual onset decoherence scatterings opens emissions. examining multiplicity gluons potentially logarithmic enhancement dense opening angles. modification size. briefly comment phenomenological consequences setup pages figures. typos updated references. updated. publication | non_dup | [] |
24951914 | 10.1007/JHEP12(2013)055 | We perform a detailed analysis of the predictions of resummed perturbation
theory for the pressure and the second-, fourth-, and sixth-order diagonal
quark number susceptibilities in a hot and dense quark-gluon plasma. First, we
present an exact one-loop calculation of the equation of state within
hard-thermal-loop perturbation theory (HTLpt) and compare it to a previous
one-loop HTLpt calculation that employed an expansion in the ratios of thermal
masses and the temperature. We find that this expansion converges reasonably
fast. We then perform a resummation of the existing four-loop weak coupling
expression for the pressure, motivated by dimensional reduction. Finally, we
compare the exact one-loop HTLpt and resummed dimensional reduction results
with state-of-the-art lattice calculations and a recent mass-expanded
three-loop HTLpt calculation.Comment: 43 pages, 10 figures. v3: Matching published versio | Equation of State of hot and dense QCD: Resummed perturbation theory
confronts lattice data | equation of state of hot and dense qcd: resummed perturbation theory confronts lattice data | resummed perturbation fourth sixth diagonal susceptibilities dense gluon plasma. perturbation htlpt htlpt temperature. converges reasonably fast. resummation motivated reduction. htlpt resummed expanded htlpt pages figures. matching versio | non_dup | [] |
24950241 | 10.1007/JHEP12(2013)056 | The purpose of this note is to extend the results obtained in
[arXiv:1303.6970] in two ways. First, the six-dimensional F-theory
compactifications with U(1) x U(1) gauge symmetry on elliptic Calabi-Yau
threefolds, constructed as a hypersurface in $dP_2$ fibered over the base
$B=\mathbb{P}^2$ [arXiv:1303.6970], are generalized to Calabi-Yau threefolds
elliptically fibered over an arbitrary two-dimensional base B. While the
representations of the matter hypermultiplets remain unchanged, their
multiplicities are calculated for an arbitrary B. Second, for a specific
non-generic subset of such Calabi-Yau threefolds we engineer SU(5) x U(1) x
U(1) gauge symmetry. We summarize the hypermultiplet matter representations,
which remain the same as for the choice of the base $B=\mathbb{P}^2$
[arXiv:1306.3987], and determine their multiplicities for an arbitrary B. We
also verify that the obtained spectra cancel anomalies both for U(1) x U(1) and
SU(5) x U(1) x U(1).Comment: 13pp, Addendum to arXiv:1303.697 | F-Theory Compactifications with Multiple U(1)-Factors: Addendum | f-theory compactifications with multiple u(1)-factors: addendum | extend ways. compactifications elliptic calabi threefolds hypersurface fibered mathbb calabi threefolds elliptically fibered representations hypermultiplets unchanged multiplicities generic calabi threefolds engineer symmetry. summarize hypermultiplet representations mathbb multiplicities verify cancel anomalies .comment addendum | non_dup | [] |
24971270 | 10.1007/JHEP12(2013)059 | We construct a new class of entanglement measures by extending the usual
definition of Renyi entropy to include a chemical potential. These charged
Renyi entropies measure the degree of entanglement in different charge sectors
of the theory and are given by Euclidean path integrals with the insertion of a
Wilson line encircling the entangling surface. We compute these entropies for a
spherical entangling surface in CFT's with holographic duals, where they are
related to entropies of charged black holes with hyperbolic horizons. We also
compute charged Renyi entropies in free field theories.Comment: 58 pages, v2 - figures fixed and references adde | Holographic Charged Renyi Entropies | holographic charged renyi entropies | entanglement extending usual renyi potential. renyi entropies entanglement sectors euclidean integrals insertion wilson encircling entangling surface. entropies spherical entangling holographic duals entropies holes hyperbolic horizons. renyi entropies pages adde | non_dup | [] |
24950362 | 10.1007/JHEP12(2013)062 | A new class of N=2 locally supersymmetric higher-derivative invariants is
constructed based on logarithms of conformal primary chiral superfields. They
characteristically involve a coupling to R_{\mu\nu}^2 - 1/3*R^2, which equals
the non-conformal part of the Gauss-Bonnet term. Upon combining one such
invariant with the known supersymmetric version of the square of the Weyl
tensor, one obtains the supersymmetric extension of the Gauss-Bonnet term. The
construction is carried out in the context of both conformal superspace and the
superconformal multiplet calculus. The new class of supersymmetric invariants
resolves two open questions. The first concerns the proper identification of
the 4D supersymmetric invariants that arise from dimensional reduction of the
5D mixed gauge-gravitational Chern-Simons term. The second is why the pure
Gauss-Bonnet term without supersymmetric completion has reproduced the correct
result in calculations of the BPS black hole entropy in certain models.Comment: 45 pages; v2: version to appear in JHE | New higher-derivative invariants in N=2 supergravity and the
Gauss-Bonnet term | new higher-derivative invariants in n=2 supergravity and the gauss-bonnet term | locally supersymmetric invariants logarithms conformal chiral superfields. characteristically involve equals conformal gauss bonnet term. combining supersymmetric weyl obtains supersymmetric gauss bonnet term. conformal superspace superconformal multiplet calculus. supersymmetric invariants resolves questions. concerns proper supersymmetric invariants arise gravitational chern simons term. gauss bonnet supersymmetric completion reproduced pages | non_dup | [] |
24980113 | 10.1007/JHEP12(2013)063 | We revisit 2D $\mathcal{N}=(2,2)$ super Yang-Mills lattice formulation
(Sugino model) to investigate its fermion action with two (Majorana) fermion
flavors and exact chiral-$U(1)_{R}$ symmetry. We show that the reconcilement of
chiral symmetry and absence of further species-doubling originates in the 4D
clifford algebra structure of the action, where 2D two flavors are spuriously
treated as a single 4D four-spinor with four 4D gamma matrices introduced into
kinetic and Wilson terms. This fermion construction based on the
higher-dimensional clifford algebra is extended to four dimensions in two
manners: (1) pseudo-8D sixteen-spinor treatment of 4D four flavors with eight
8D gamma matrices, (2) pseudo-6D eight-spinor treatment of 4D two flavors with
five out of six 6D gamma matrices. We obtain 4D four-species and two-species
lattice fermions with unbroken subgroup of chiral symmetry and other essential
properties. We discuss their relations to staggered and Wilson twisted-mass
fermions. We also discuss their potential feedback to 4D super Yang-Mills
lattice formulations.Comment: 24 pages; references added, typos correcte | Fermion Actions extracted from Lattice Super Yang-Mills Theories | fermion actions extracted from lattice super yang-mills theories | revisit mathcal super mills formulation sugino fermion majorana fermion flavors chiral symmetry. reconcilement chiral doubling originates clifford flavors spuriously spinor gamma wilson terms. fermion clifford manners pseudo sixteen spinor flavors eight gamma pseudo eight spinor flavors gamma matrices. fermions unbroken subgroup chiral properties. staggered wilson twisted fermions. super mills pages typos correcte | non_dup | [] |
2117773 | 10.1007/JHEP12(2013)065 | In this work, we find exact gravastar solutions in the context of
noncommutative geometry, and explore their physical properties and
characteristics. The energy density of these geometries is a smeared and
particle-like gravitational source, where the mass is diffused throughout a
region of linear dimension $\sqrt{(\alpha)}$ due to the intrinsic uncertainty
encoded in the coordinate commutator. These solutions are then matched to an
exterior Schwarzschild spacetime. We further explore the dynamical stability of
the transition layer of these gravastars, for the specific case of
$\beta=M^2/\alpha<1.9$, where M is the black hole mass, to linearized
spherically symmetric radial perturbations about static equilibrium solutions.
It is found that large stability regions exist and, in particular, located
sufficiently close to where the event horizon is expected to form.Comment: 6 pages, 3 figure | Linearized stability analysis of gravastars in noncommutative geometry | linearized stability analysis of gravastars in noncommutative geometry | gravastar noncommutative explore characteristics. geometries smeared gravitational diffused sqrt alpha intrinsic encoded coordinate commutator. matched exterior schwarzschild spacetime. explore gravastars beta alpha linearized spherically perturbations solutions. sufficiently horizon pages | non_dup | [] |
24962047 | 10.1007/JHEP12(2013)067 | We demonstrate here that the mini-split version of the Minimal Supersymmetric
Standard Model (MSSM) including R-parity violating couplings naturally provides
all the necessary ingredients for a novel baryogenesis mechanism. The
baryogenesis is triggered by the late decay of a TeV scale bino after its
thermal freezeout. A \mu-term larger than the sfermion masses is necessary for
obtaining sufficient baryon asymmetry. Two example models of direct
baryogenesis and leptogenesis are proposed, with viable parameter spaces
presented. The cosmological conditions for the models--in particular, the
requirements of a long lifetime of bino and sufficient baryon asymmetry--point
towards the mini-split scale of $\sim$ 100-1000 TeV for the sfermion masses.
This provides an independent motivation for mini-split SUSY, along with the
constraints from flavor physics and Higgs mass measurement. We also discuss the
potential multi-pronged search for the signatures of such models, including
those at the Large Hadron Collider (LHC) and the low energy experiments at the
intensity frontier.Comment: 17 pages, 7 figure | Natural Baryogenesis from Unnatural Supersymmetry | natural baryogenesis from unnatural supersymmetry | mini split supersymmetric mssm parity violating couplings naturally ingredients baryogenesis mechanism. baryogenesis triggered bino freezeout. sfermion obtaining baryon asymmetry. baryogenesis leptogenesis viable presented. cosmological lifetime bino baryon asymmetry mini split sfermion masses. motivation mini split susy flavor measurement. pronged signatures hadron collider pages | non_dup | [] |
24954600 | 10.1007/JHEP12(2013)068 | Vasiliev's type A higher spin theories in AdS4 have been conjectured to be
dual to the U(N) or O(N) singlet sectors in 3-d conformal field theories with
N-component scalar fields. We compare the O(N^0) correction to the 3-sphere
free energy F in the CFTs with corresponding calculations in the higher spin
theories. This requires evaluating a regularized sum over one loop vacuum
energies of an infinite set of massless higher spin gauge fields in Euclidean
AdS4. For the Vasiliev theory including fields of all integer spin and a scalar
with Delta=1 boundary condition, we show that the regularized sum vanishes.
This is in perfect agreement with the vanishing of subleading corrections to F
in the U(N) singlet sector of the theory of N free complex scalar fields. For
the minimal Vasiliev theory including fields of only even spin, the regularized
sum remarkably equals the value of F for one free real scalar field. This
result may agree with the O(N) singlet sector of the theory of N real scalar
fields, provided the coupling constant in the Vasiliev theory is identified as
G_N ~ 1/(N-1). Similarly, consideration of the USp(N) singlet sector for N
complex scalar fields, which we conjecture to be dual to the husp(2;0|4)
Vasiliev theory, requires G_N ~ 1/(N+1). We also test the higher spin AdS3/CFT2
conjectures by calculating the regularized sum over one loop vacuum energies of
higher spin fields in AdS3. We match the result with the O(N^0) term in the
central charge of the W_N minimal models; this requires a certain truncation of
the CFT operator spectrum so that the bulk theory contains two real scalar
fields with the same boundary conditions.Comment: 20 pages. v3: minor corrections, version published in JHE | One Loop Tests of Higher Spin AdS/CFT | one loop tests of higher spin ads/cft | vasiliev conjectured singlet sectors conformal fields. sphere cfts theories. evaluating regularized infinite massless euclidean vasiliev integer delta regularized vanishes. perfect vanishing subleading singlet fields. vasiliev regularized remarkably equals field. agree singlet vasiliev consideration singlet conjecture husp vasiliev conjectures calculating regularized match truncation pages. minor | non_dup | [] |
24937450 | 10.1007/JHEP12(2013)069 | An algorithm to systematically construct all Calabi-Yau elliptic fibrations
realized as hypersurfaces in a toric ambient space for a given base and gauge
group is described. This general method is applied to the particular question
of constructing SU(5) GUTs with multiple U(1) gauge factors. The basic data
consists of a top over each toric divisor in the base together with
compactification data giving the embedding into a reflexive polytope. The
allowed choices of compactification data are integral points in an auxiliary
polytope. In order to ensure the existence of a low-energy gauge theory, the
elliptic fibration must be flat, which is reformulated into conditions on the
top and its embedding. In particular, flatness of SU(5) fourfolds imposes
additional linear constraints on the auxiliary polytope of compactifications,
and is therefore non-generic. Abelian gauge symmetries arising in toric
F-theory compactifications are studied systematically. Associated to each top,
the toric Mordell-Weil group determining the minimal number of U(1) factors is
computed. Furthermore, all SU(5)-tops and their splitting types are determined
and used to infer the pattern of U(1) matter charges.Comment: 34 pages, 8 figures, 6 tables; v2: references added, improved U(1)
sca | Geometric Engineering in Toric F-Theory and GUTs with U(1) Gauge Factors | geometric engineering in toric f-theory and guts with u(1) gauge factors | systematically calabi elliptic fibrations realized hypersurfaces toric ambient described. constructing guts factors. toric divisor compactification giving embedding reflexive polytope. choices compactification auxiliary polytope. ensure elliptic fibration reformulated embedding. flatness fourfolds imposes auxiliary polytope compactifications generic. abelian symmetries arising toric compactifications systematically. toric mordell weil determining computed. tops splitting infer pages tables | non_dup | [] |
24956325 | 10.1007/JHEP12(2013)070 | We consider quantum quench by a time dependent double trace coupling in a
strongly coupled large N field theory which has a gravity dual via the AdS/CFT
correspondence. The bulk theory contains a self coupled neutral scalar field
coupled to gravity with negative cosmological constant. We study the scalar
dynamics in the probe approximation in two backgrounds: AdS soliton and AdS
black brane. In either case we find that in equilibrium there is a critical
phase transition at a {\em negative} value of the double trace coupling
$\kappa$ below which the scalar condenses. For a slowly varying homogeneous
time dependent coupling crossing the critical point, we show that the dynamics
in the critical region is dominated by a single mode of the bulk field. This
mode satisfies a Landau-Ginsburg equation with a time dependent mass, and leads
to Kibble Zurek type scaling behavior. For the AdS soliton the system is
non-dissipative and has $z=1$, while for the black brane one has dissipative
$z=2$ dynamics. We also discuss the features of a holographic model which would
describe the non-equilibrium dynamics around quantum critical points with
arbitrary dynamical critical exponent $z$ and correlation length exponent
$\nu$. These analytical results are supported by direct numerical solutions.Comment: 29 pages, 7 figure | Quantum Quench and Double Trace Couplings | quantum quench and double trace couplings | quench trace correspondence. neutral cosmological constant. backgrounds soliton brane. trace kappa condenses. slowly homogeneous crossing dominated field. satisfies landau ginsburg kibble zurek behavior. soliton dissipative brane dissipative dynamics. holographic exponent exponent pages | non_dup | [] |
24968312 | 10.1007/JHEP12(2013)072 | We propose a new model of flavour chiral symmetry breaking in a
(2+1)-dimensional defect gauge theory of strongly coupled fermions by
introducing probe D5/anti-D5-flavour branes on the conifold. After working out
the flavour brane embeddings at zero temperature, we thoroughly investigate the
spectra of small fluctuations on the world volume of the flavour branes (meson
spectrum) and conclude that they are free of tachyons. Thus the proposed probe
brane embedding is stable. Moreover, we introduce finite temperature and an
external magnetic field and study the thermodynamics of the resulting
configurations. Namely, we compute the free energies, entropies, heat
capacities and magnetisations. The results are used to establish a detailed
phase diagram of the model. We find that the effect of magnetic catalysis of
chiral symmetry breaking is realised in our model and show that the
meson-melting phase transition coincides with the chiral symmetry breaking
phase transition. Furthermore, we show that the model is in a diamagnetic
phase.Comment: 1+28 pages, 23 figures, PDFTeX, v2: comments and refs. added, version
accepted for publication by JHE | A Novel (2+1)-Dimensional Model of Chiral Symmetry Breaking | a novel (2+1)-dimensional model of chiral symmetry breaking | propose flavour chiral breaking defect fermions introducing flavour branes conifold. flavour brane embeddings thoroughly flavour branes meson tachyons. brane embedding stable. thermodynamics configurations. entropies capacities magnetisations. establish model. catalysis chiral breaking realised meson melting coincides chiral breaking transition. diamagnetic pages pdftex comments refs. publication | non_dup | [] |
24957899 | 10.1007/JHEP12(2013)073 | The dynamics of the magnetic field in a superconducting phase is described by
an effective massive bosonic field theory. If the superconductor is confined in
a domain M with boundary \partial M, the boundary conditions of the
electromagnetic fields are predetermined by physics. They are time-reversal and
also parity invariant for adapted geometry. They lead to edge excitations while
in comparison, the bulk energies have a large gap. A similar phenomenon occurs
for topological insulators where appropriate boundary conditions for the Dirac
Hamiltonian also lead to similar edge states and an 'incompressible bulk'. They
give spin-momentum locking as well. In addition time-reversal and parity
invariance emerge for adapted geometry. Similar edge states appear in QCD bag
models with chiral boundary conditions.Comment: 29 pages, 7 figure | Edge States: Topological Insulators, Superconductors and QCD Chiral Bags | edge states: topological insulators, superconductors and qcd chiral bags | superconducting massive bosonic theory. superconductor confined electromagnetic predetermined physics. reversal parity adapted geometry. excitations gap. phenomenon topological insulators dirac incompressible locking well. reversal parity invariance emerge adapted geometry. chiral pages | non_dup | [] |
24965499 | 10.1007/JHEP12(2013)074 | We associate a Jacobi form over a rank s lattice to N=2, D=4 heterotic string
compactifications which have s Wilson lines at a generic point in the vector
multiplet moduli space. Jacobi forms of index m=1 and m=2 have appeared earlier
in the context of threshold corrections to heterotic string couplings. We
emphasize that higher index Jacobi forms as well as Jacobi forms of several
variables over more generic even lattices also appear and construct models in
which they arise. In particular, we construct an orbifold model which can be
connected to models that give index m=3, 4 or 5 Jacobi forms through the
Higgsing process. Constraints from being a Jacobi form are then employed to get
threshold corrections using only partial information on the spectrum. We apply
this procedure for index m=3, 4 or 5 Jacobi form examples and also for Jacobi
forms over A_2 and A_3 root lattices. Examples with a single Wilson line are
examined in detail and we display the relation of Siegel forms over a
paramodular group \Gamma_m to these models, where \Gamma_m is associated with
the T-duality group of the models we study. Finally, results on the heterotic
string side are used to clarify the linear mapping of vector multiplet moduli
to Type IIA duals without using the one-loop cubic part of the prepotential on
the Type II side, and also to give predictions for the geometry of the dual
Calabi-Yau manifolds.Comment: 55 page | Jacobi Forms of Higher Index and Paramodular Groups in N=2, D=4
Compactifications of String Theory | jacobi forms of higher index and paramodular groups in n=2, d=4 compactifications of string theory | associate jacobi heterotic compactifications wilson generic multiplet moduli space. jacobi appeared heterotic couplings. emphasize jacobi jacobi generic lattices arise. orbifold jacobi higgsing process. jacobi spectrum. jacobi jacobi lattices. wilson display siegel paramodular gamma gamma duality study. heterotic clarify multiplet moduli duals cubic prepotential calabi | non_dup | [] |
24961392 | 10.1007/JHEP12(2013)075 | We explore modifications to the loop-induced Higgs couplings h\gamma\gamma\
and h\gamma Z from light charginos in the Minimal Supersymmetric Standard
Model. When the lightest chargino mass is above the naive LEP bound of order
100 GeV the effects are modest, with deviations in the decay branching ratios
typically less than 15% from the Standard Model predictions. However, if the
charginos are lighter than 100 GeV, more dramatic alterations to these
couplings are possible as a consequence of the rise of the one loop form
factor. For example, the diphoton signal strength can be enhanced by as much as
70% compared to the Standard Model value. We scrutinize in detail the existing
LEP, Tevatron, and LHC searches and present a scenario in which a very light
chargino with a mass as light as half the Higgs mass is hidden at LEP and is
allowed by all direct collider constraints and electroweak precision tests. The
scenario has a sneutrino LSP with a macroscopic decay length of order 10-100
cm. We outline potential search strategies to test this scenario at the LHC.Comment: 14 pages, 7 figure | Very Light Charginos and Higgs Decays | very light charginos and higgs decays | explore modifications couplings gamma gamma gamma charginos supersymmetric model. lightest chargino naive modest deviations branching predictions. charginos lighter dramatic alterations couplings factor. diphoton value. scrutinize tevatron searches chargino hidden collider electroweak precision tests. sneutrino macroscopic outline pages | non_dup | [] |
24971513 | 10.1007/JHEP12(2013)076 | The LHC and other experiments show so far no sign of new physics and
long-held beliefs about naturalness should be critically reexamined. We discuss
therefore in this paper a model with a combined breaking of conformal and
electroweak symmetry by a strongly coupled hidden sector. Even though the
conformal symmetry is anomalous, this may still provide an explanation of the
smallness of electroweak scale compared to the Planck scale. Specifically we
start from a classically conformal model, in which a strongly coupled hidden
sector undergoes spontaneous chiral symmetry breaking. A coupling via a real
scalar field transmits the breaking scale to the Standard Model Higgs and
triggers electroweak symmetry breaking. The model contains dark matter
candidates in the form of dark pions, whose stability is being guaranteed by
the flavor symmetry of hidden quark sector. We study its relic abundance and
direct detection prospects with the Nambu-Jona-Lasinio method and discuss the
phase transition in the dark sector as well as in the electroweak sector.Comment: 27 Pages, 13 Figures, DM-DM-S coupling is rescaled with wave function
renormalization of DM. Changes in thermal average cross-section and to
Figure.8. Phenomenology and conclusion remain the same. Matches published
versio | Electroweak and Conformal Symmetry Breaking by a Strongly Coupled Hidden
Sector | electroweak and conformal symmetry breaking by a strongly coupled hidden sector | held beliefs naturalness critically reexamined. breaking conformal electroweak hidden sector. conformal anomalous explanation smallness electroweak planck scale. classically conformal hidden undergoes spontaneous chiral breaking. transmits breaking triggers electroweak breaking. candidates pions guaranteed flavor hidden sector. relic abundance prospects nambu jona lasinio electroweak pages rescaled renormalization figure. phenomenology same. matches versio | non_dup | [] |
24977239 | 10.1007/JHEP12(2013)080 | We compute the next-to-maximally-helicity-violating one-loop n-gluon
amplitudes in N=1 super-Yang-Mills theory. These amplitudes contain three
negative-helicity gluons and an arbitrary number of positive-helicity gluons,
and constitute the first infinite series of amplitudes beyond the simplest,
MHV, amplitudes. We assemble ingredients from the N=4 NMHV tree super-amplitude
into previously unwritten double cuts and use the spinor integration technique
to calculate all bubble coefficients. We also derive the missing box
coefficients from quadruple cuts. Together with the known formula for
three-mass triangles, this completes the set of NMHV one-loop master integral
coefficients in N=1 SYM. To facilitate further use of our results, we provide
their Mathematica implementation.Comment: 49 pages, 12 figures, 2 Mathematica files attached: N1chiralAll.nb,
Ammppmppp.nb; v2 minor corrections, journal versio | All one-loop NMHV gluon amplitudes in N=1 SYM | all one-loop nmhv gluon amplitudes in n=1 sym | maximally helicity violating gluon amplitudes super mills theory. amplitudes helicity gluons helicity gluons constitute infinite amplitudes simplest amplitudes. assemble ingredients nmhv super unwritten cuts spinor bubble coefficients. derive missing quadruple cuts. triangles completes nmhv master sym. facilitate mathematica pages mathematica files attached chiralall.nb ammppmppp.nb minor versio | non_dup | [] |
24977411 | 10.1007/JHEP12(2013)084 | We present the currently most precise W boson mass (M_W) prediction in the
Minimal Supersymmetric Standard Model (MSSM) and discuss how it is affected by
recent results from the LHC. The evaluation includes the full one-loop result
and all known higher order corrections of SM and SUSY type. We show the MSSM
prediction in the M_W-m_t plane, taking into account constraints from Higgs and
SUSY searches. We point out that even if stops and sbottoms are heavy,
relatively large SUSY contributions to M_W are possible if either charginos,
neutralinos or sleptons are light. In particular we analyze the effect on the
M_W prediction of the Higgs signal at about 125.6 GeV, which within the MSSM
can in principle be interpreted as the light or the heavy CP-even Higgs boson.
For both interpretations the predicted MSSM region for M_W is in good agreement
with the experimental measurement. We furthermore discuss the impact of
possible future LHC results in the stop sector on the M_W prediction,
considering both the cases of improved limits and of the detection of a scalar
top quark.Comment: 28 pages, 8 figure | Implications of LHC search results on the W boson mass prediction in the
MSSM | implications of lhc search results on the w boson mass prediction in the mssm | precise boson supersymmetric mssm lhc. susy type. mssm susy searches. stops sbottoms susy charginos neutralinos sleptons light. analyze mssm interpreted boson. interpretations mssm measurement. stop pages | non_dup | [] |
24958774 | 10.1007/JHEP12(2013)085 | We study a multi-matrix model whose low temperature phase is a fuzzy sphere
that undergoes an evaporation transition as the temperature is increased. We
investigate finite size scaling of the system as the limiting temperature of
stability of the fuzzy sphere phase is approached. We find on theoretical
grounds that the system should obey scaling with specific heat exponent
\alpha=1/2, shift exponent \bar \lambda=4/3 and that the peak in the specific
heat grows with exponent \bar \omega=2/3. Using hybrid Monte Carlo simulations
we find good collapse of specific heat data consistent with a scaling ansatz
which give our best estimates for the scaling exponents as \alpha=0.50 \pm
0.01,\bar \lambda=1.41 \pm 0.08 and \bar \omega=0.66 \pm 0.08 .Comment: 30 pages, 10 figure | Critical Behaviour of the Fuzzy Sphere | critical behaviour of the fuzzy sphere | fuzzy sphere undergoes evaporation increased. limiting fuzzy sphere approached. grounds obey exponent alpha exponent lambda grows exponent omega hybrid monte carlo collapse ansatz exponents alpha lambda omega .comment pages | non_dup | [] |
24970361 | 10.1007/JHEP12(2013)086 | We propose a model of the Kondo effect based on the Anti-de Sitter/Conformal
Field Theory (AdS/CFT) correspondence, also known as holography. The Kondo
effect is the screening of a magnetic impurity coupled anti-ferromagnetically
to a bath of conduction electrons at low temperatures. In a (1+1)-dimensional
CFT description, the Kondo effect is a renormalization group flow triggered by
a marginally relevant (0+1)-dimensional operator between two fixed points with
the same Kac-Moody current algebra. In the large-N limit, with spin SU(N) and
charge U(1) symmetries, the Kondo effect appears as a (0+1)-dimensional
second-order mean-field transition in which the U(1) charge symmetry is
spontaneously broken. Our holographic model, which combines the CFT and large-N
descriptions, is a Chern-Simons gauge field in (2+1)-dimensional AdS space,
AdS3, dual to the Kac-Moody current, coupled to a holographic superconductor
along an AdS2 subspace. Our model exhibits several characteristic features of
the Kondo effect, including a dynamically generated scale, a resistivity with
power-law behavior in temperature at low temperatures, and a spectral flow
producing a phase shift. Our holographic Kondo model may be useful for studying
many open problems involving impurities, including for example the Kondo
lattice problem.Comment: 42 pages, 10 eps files in 6 figure | A Holographic Model of the Kondo Effect | a holographic model of the kondo effect | propose kondo sitter conformal correspondence holography. kondo screening impurity ferromagnetically bath conduction temperatures. kondo renormalization triggered marginally moody algebra. symmetries kondo spontaneously broken. holographic combines descriptions chern simons moody holographic superconductor subspace. exhibits kondo dynamically resistivity producing shift. holographic kondo studying involving impurities kondo pages files | non_dup | [] |
24952181 | 10.1007/JHEP12(2013)087 | We study the hydrodynamics of relativistic fluids with several conserved
global charges (i.e., several species of particles) by performing a
Kaluza-Klein dimensional reduction of a neutral fluid on a N-torus. Via
fluid/gravity correspondence, this allows us to describe the long-wavelength
dynamics of black branes with several Kaluza-Klein charges. We obtain the
equation of state and transport coefficients of the charged fluid directly from
those of the higher-dimensional neutral fluid. We specialize these results for
the fluids dual to Kaluza-Klein black branes.Comment: v2, Important additions: (1) discussion of the first law for the
reduced fluid, (2) transport coefficients in terms of the temperature and the
chemical potentials. Some comments and references added. 24 page | Kaluza-Klein reduction of relativistic fluids and their gravity duals | kaluza-klein reduction of relativistic fluids and their gravity duals | hydrodynamics relativistic fluids conserved charges i.e. performing kaluza klein neutral torus. correspondence branes kaluza klein charges. neutral fluid. specialize fluids kaluza klein additions potentials. comments added. | non_dup | [] |
24977173 | 10.1007/JHEP12(2013)088 | We compute the contributions to the N3LO inclusive Higgs boson cross-section
from the square of one-loop amplitudes with a Higgs boson and three QCD partons
as external states. Our result is a Taylor expansion in the dimensional
regulator epsilon, where the coefficients of the expansion are analytic
functions of the ratio of the Higgs boson mass and the partonic center of mass
energy and they are valid for arbitrary values of this ratio. We also perform a
threshold expansion around the limit of soft-parton radiation in the final
state. The expressions for the coefficients of the threshold expansion are
valid for arbitrary values of the dimension. As a by-product of the threshold
expansion calculation, we have developed a soft expansion method at the
integrand level by identifying the relevant soft and collinear regions for the
loop-momentum.Comment: 46 page | Real-Virtual contributions to the inclusive Higgs cross-section at N3LO | real-virtual contributions to the inclusive higgs cross-section at n3lo | inclusive boson amplitudes boson partons states. taylor regulator epsilon analytic boson partonic valid ratio. parton state. expressions valid dimension. integrand identifying collinear | non_dup | [] |
24947352 | 10.1007/JHEP12(2013)089 | We extract from data the parameters of the Higgs potential, the top Yukawa
coupling and the electroweak gauge couplings with full 2-loop NNLO precision,
and we extrapolate the SM parameters up to large energies with full 3-loop NNLO
RGE precision. Then we study the phase diagram of the Standard Model in terms
of high-energy parameters, finding that the measured Higgs mass roughly
corresponds to the minimum values of the Higgs quartic and top Yukawa and the
maximum value of the gauge couplings allowed by vacuum metastability. We
discuss various theoretical interpretations of the near-criticality of the
Higgs mass.Comment: 43 pages, 7 figures. v3: updated with latest Higgs and top mass,
corrected NNLO result for g2 and g | Investigating the near-criticality of the Higgs boson | investigating the near-criticality of the higgs boson | extract yukawa electroweak couplings nnlo precision extrapolate nnlo precision. roughly quartic yukawa couplings metastability. interpretations criticality pages figures. updated latest corrected nnlo | non_dup | [] |
19535792 | 10.1007/JHEP12(2013)090 | A search for the doubly charmed baryon Ξ+cc in the decay mode Ξ+cc→Λ+cK−π+ is performed with a data sample, corresponding to an integrated luminosity of 0.65 fb−1, of pp collisions recorded at a centre-of-mass energy of 7 TeV. No significant signal is found in the mass range 3300-3800 MeV/c 2. Upper limits at the 95% confidence level on the ratio of the Ξ+cc production cross-section times branching fraction to that of the Λ+c , R, are given as a function of the Ξ+cc mass and lifetime. The largest upper limits range from R < 1.5 × 10−2 for a lifetime of 100 fs to R < 3.9 × 10−4 for a lifetime of 400 fs | Search for the doubly charmed baryon Xi_cc^+ | search for the doubly charmed baryon xi_cc^+ | doubly charmed baryon cc→λ ck−π luminosity collisions tev. confidence branching lifetime. lifetime lifetime | non_dup | [] |
24943338 | 10.1007/JHEP12(2013)091 | We analyze the theory of massive fermions in the fundamental representation
coupled to a U(N) Chern-Simons gauge theory at level K. It is done in the large
N, large K limits where \lambda=N/K is kept fixed. Following arXiv:1110.4386 we
obtain the solution of a Schwinger-Dyson equation for the two point function,
the exact expression for the fermion propagator and the partition function at
finite temperature. We prove that in the large K limit there exists an infinite
set of classically conserved high spin currents also when a mass is introduced,
breaking the conformal invariance. In analogy to the seminal work of 't Hooft
on two dimensional QCD, we write down a Bethe-Salpeter equation for the wave
function of a "quark anti-quark" bound state. We show that unlike the two
dimensional QCD case, the three dimensional Chern-Simons theory does not admit
a confining spectrum.Comment: 17 pages,2 figures, comments and acknowledgements adde | Breaking conformal invariance- Large N Chern-Simons theory coupled to
massive fundamental fermions | breaking conformal invariance- large n chern-simons theory coupled to massive fundamental fermions | analyze massive fermions chern simons lambda kept fixed. schwinger dyson fermion propagator partition temperature. infinite classically conserved currents breaking conformal invariance. analogy seminal hooft bethe salpeter state. unlike chern simons admit confining pages comments acknowledgements adde | non_dup | [] |
24962145 | 10.1007/JHEP12(2013)092 | We study the BPS spectrum of four-dimensional $\mathcal{N}=2$ superconformal
field theory of Argyres-Douglas type, obtained via twisted compactification of
six-dimensional $A_{N-1}$ $(2,0)$ theory on a sphere with an irregular
puncture, by using spectral networks. We give strong evidence of the
equivalence of $\mathcal{N}=2$ superconformal field theories from
six-dimensional theories of different ranks by systematically comparing the
chamber structure and wall-crossing phenomena.Comment: 56 pages, 150+ color figures; v2: several minor change | BPS spectrum of Argyres-Douglas theory via spectral network | bps spectrum of argyres-douglas theory via spectral network | mathcal superconformal argyres douglas twisted compactification sphere irregular puncture networks. equivalence mathcal superconformal ranks systematically chamber crossing pages minor | non_dup | [] |
9325750 | 10.1007/JHEP12(2013)093 | The well-accepted Nelson-Seiberg theorem relates R-symmetries to
supersymmetry (SUSY) breaking vacua, and provides a guideline for SUSY model
building which is the most promising physics beyond the Standard Model. In the
case of Wess-Zumino models with perturbative superpotentials, we revise the
theorem to a combined necessary and sufficient condition for SUSY breaking
which can be easily checked before solving the vacuum. The revised theorem
provides a powerful tool to construct either SUSY breaking or SUSY vacua, and
offers many practicable applications in low energy SUSY model building and
string phenomenology.Comment: 5 pages; v2: abstract and introduction revised; v3: condition of
perturbative superpotentials added, JHEP published versio | The Nelson-Seiberg theorem revised | the nelson-seiberg theorem revised | nelson seiberg relates symmetries supersymmetry susy breaking vacua guideline susy promising model. wess zumino perturbative superpotentials revise susy breaking checked solving vacuum. revised powerful susy breaking susy vacua offers practicable susy pages revised perturbative superpotentials jhep versio | non_dup | [] |
24955222 | 10.1007/JHEP12(2013)094 | In the three-dimensional sl(N) Chern-Simons higher-spin theory, we prove that
the conical surplus and the black hole solution are related by the
S-transformation of the modulus of the boundary torus. Then applying the
modular group on a given conical surplus solution, we generate a 'SL(2,Z)'
family of smooth constant solutions. We then show how these solutions are
mapped into one another by coordinate transformations that act non-trivially on
the homology of the boundary torus. After deriving a thermodynamics that
applies to all the solutions in the 'SL(2,Z)' family, we compute their
entropies and free energies, and determine how the latter transform under the
modular transformations. Summing over all the modular images of the conical
surplus, we write down a (tree-level) modular invariant partition function.Comment: 51 pages; v2: minor corrections and additions; v3: final version, to
appear in JHE | Modular Properties of 3D Higher Spin Theory | modular properties of 3d higher spin theory | chern simons conical surplus modulus torus. modular conical surplus solutions. mapped coordinate transformations trivially homology torus. deriving thermodynamics applies entropies transform modular transformations. summing modular conical surplus modular partition pages minor additions | non_dup | [] |
24960008 | 10.1007/JHEP12(2013)098 | Running couplings can be understood as arising from the spontaneous breaking
of an exact scale invariance in appropriate effective theories with no
dilatation anomaly. Any ordinary quantum field theory, even if it has massive
fields, can be embedded into a theory with spontaneously broken exact scale
invariance in such a way that the ordinary running is recovered in the
appropriate limit, as long as the potential has a flat direction. These
scale-invariant theories, however, do not necessarily solve the cosmological
constant or naturalness problems, which become manifest in the need to
fine-tune dimensionless parameters.Comment: 24 pages. v2, v3: Added references, improved discussions. v4:
Published versio | Running couplings with a vanishing scale anomaly | running couplings with a vanishing scale anomaly | running couplings understood arising spontaneous breaking invariance dilatation anomaly. ordinary massive embedded spontaneously broken invariance ordinary running recovered direction. necessarily solve cosmological naturalness manifest fine tune dimensionless pages. discussions. versio | non_dup | [] |