pinecone/core-2020-05-10-deduplication huggingface dataset:
An ω deformation of gauged STU supergravity

Four-dimensional $ \mathcal{N} $ = 2 gauged STU supergravity is a consistent truncation of the standard $ \mathcal{N} $ = 8 gauged SO(8) supergravity in which just the four U(1) gauge fields in the Cartan subgroup of SO(8) are retained. One of these is the graviphoton in the $ \mathcal{N} $ = 2 supergravity multiplet and the other three lie in three vector multiplets. In this paper we carry out the analogous consistent truncation of the newly-discovered family of ω-deformed $ \mathcal{N} $ = 8 gauged SO(8) supergravities, there by obtaining a family of ω -deformed STU gauged supergravities. Unlike in some other truncations of the deformed $ \mathcal{N} $ = 8 supergravity that have been considered, here the scalar potential of the deformed STU theory is independent of the ω parameter. However, it enters in the scalar couplings in the gauge-field kinetic terms, and it is non-trivial because of the minimal couplings of the fermion fields to the gauge potentials. We discuss the supersymmetry transformation rules in the ω -deformed supergravities, and present some examples of black hole solutions
Measuring Boosted Tops in Semi-leptonic $t\bar t$ Events for the
  Standard Model and Beyond

We present a procedure for tagging boosted semi-leptonic $t\bar t$ events
based on the Template Overlap Method. We introduce a new formulation of the
template overlap function for leptonically decaying boosted tops and show that
it can be used to compensate for the loss of background rejection due to
reduction of b-tagging efficiency at high $p_T$. A study of asymmetric top pair
production due to higher order effects shows that our approach improves the
resolution of the truth level kinematic distributions. We show that the
hadronic top overlap is weakly susceptible to pileup up to 50 interactions per
bunch crossing, while leptonic overlap remains impervious to pileup to at least
70 interactions. A case study of Randall-Sundrum Kaluza-Klein gluon production
suggests that the new formulation of semi-leptonic template overlap can extend
the projected exclusion of the LHC $\sqrt{s}$ = 8 TeV run to Kaluza-Klein gluon
masses of 2.7 TeV, using the leading order signal cross section.Comment: 34 pages, 18 figures; v2. Matches version accepted for publication in
  JHEP. We added new paragraphs in the introduction and in section 7 to explain
  more clearly the scope of our study and limitations. Results unchange
Strong and radiative decays of heavy mesons in a covariant model

In this paper, we investigate symmetry breaking effects in strong and
radiative decays of heavy mesons. We study $1/m_Q$ corrections within the heavy
quark effective theory. These effects are studied in a covariant model for
heavy mesons. The numerical results are consistent with the experimental data
and some other theoretical calculations. These provide a vote of confidence for
the validity of this covariant model.Comment: 35 pages, 7 figures, minor modifications and some references added,
  accepted for publication in JHE
Shedding light on the tt¯ asymmetry: the photon handle

We investigate a charge asymmetry in tt¯γtt¯γ production at the LHC that provides complementary information to the measured asymmetries in tt¯tt¯ production. We estimate the experimental uncertainty in its measurement at the LHC with 8 TeV and 14 TeV. We argue that, for new physics models that simultaneously reproduce the asymmetry excess in tt¯tt¯ production at the Tevatron and the SM-like asymmetry at the LHC, the measurement in tt¯γtt¯γ production at the LHC is likely to deviate from the SM prediction. In two new physics models studied in detail we find that the deviations could be significant and observable at the 14 TeV run.Fil: Aguilar Saavedra, Juan Antonio. Universidad de Granada; EspañaFil: Alvarez, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Juste, A.. Institució Catalana de Recerca i Estudis Avancats; EspañaFil: Rubbo, F.. Institut de Física d’Altes Energies; Españ
Full one-loop electroweak corrections to e + e − → ZH γ at a Higgs factory

Motivated by the future precision test of the Higgs boson at an e + e − Higgs factory, we calculate the production e + e − → ZH γ in the Standard Model with complete next-to-leading order electroweak corrections. We find that for $ \sqrt{s} $ = 240 (350) GeV the cross section of this production is sizably reduced by the electroweak corrections, which is 1 . 03 (5.32) fb at leading order and 0.72 (4.79) fb at next-to-leading order. The transverse momentum distribution of the photon in the final states is also presented
Reduced modular symmetries of threshold corrections and gauge coupling unification

We revisit the question of gauge coupling unification at the string scale in orbifold compactifications of the heterotic string for the supersymmetric Standard Model. In the presence of discrete Wilson lines threshold corrections with modular symmetry that is a subgroup of the full modular group arise. We find that reduced modular symmetries not previously reported are possible. We conjecture that the effects of such threshold corrections can be simulated using sums of terms built from Dedekind eta functions to obtain the appropriate modular symmetry. For the cases of the ℤ 8 -I orbifold and the ℤ 3 × ℤ 6 orbifold it is easily possible to obtain gauge coupling unification at the “observed” scale with Kähler moduli T of approximately one
Massive p -form trapping as a p -form on a brane

It is shown here that the zero mode of any form field can be trapped to the brane using the model proposed by Ghoroku and Nakamura. We start proven that the equations of motion can be obtained without splitting the field in even and odd parts. The massive and tachyonic cases are studied revealing that this mechanism only traps the zero mode. The result is then generalized to thick branes. In this scenario, the use of a delta like interaction of the quadratic term is necessary leading to a “mixed” potential with singular and smooth contributions. It is also shown that all forms produces an effective theory in the brane without gauge fixing. The existence of resonances with the transfer matrix method is then discussed. With this we analyze the resonances and look for peaks indicating the existence of unstable modes. Curiously no resonances are found in opposition of other models in the literature. Finally we find analytical solutions for arbitrary p -forms when a specific kind of smooth scenario is considered
New predictions on the mass of the 1 −+ light hybrid meson from QCD sum rules

We calculate the coefficients of the dimension-8 quark and gluon condensates in the current-current correlator of 1 −+ light hybrid current g q ¯ x γ ν i G μ ν x q x $$ g\overline{q}(x){\gamma}_{\nu }i{G}_{\mu \nu }(x)q(x) $$ . With inclusion of these higher-power corrections and updating the input parameters, we re-analyze the mass of the 1 −+ light hybrid meson from Monte-Carlo based QCD sum rules. Considering the possible violation of factorization of higher dimensional condensates and variation of 〈 g 3 G 3 〉, we obtain a conservative mass range 1.72-2.60 GeV, which favors π 1 (2015) as a better hybrid candidate compared with π 1 (1600) and π 1 (1400)
Resummation prediction on the jet mass spectrum in one-jet inclusive production at the LHC

We study the factorization and resummation prediction on the jet mass spectrum in one-jet inclusive production at the LHC based on soft-collinear effective theory. The soft function with anti- k T algorithm is calculated at next-to-leading order and its validity is demonstrated by checking the agreement between the expanded leading singular terms with the exact fixed-order result. The large logarithms ln n ( m J 2 / p T 2 ) and the global logarithms ln n ( s 4 / p T 2 ) in the process are resummed to all order at next-to-leading logarithmic and next-to-next-to-leading logarithmic level, respectively. The cross section is enhanced by about 23% from the next-to-leading logarithmic level to next-to-next-to- leading logarithmic level. Comparing our resummation predictions with those from Monte Carlo tool PYTHIA and ATLAS data at the 7 TeV LHC, we find that the peak positions of the jet mass spectra agree with those from PYTHIA at parton level, and the predictions of the jet mass spectra with non-perturbative effects are in coincidence with the ATLAS data. We also show the predictions at the future 13 TeV LHC
Supersymmetry with non-geometric fluxes, or a β -twist in Generalized Geometry and Dirac operator

We study ten-dimensional supersymmetric vacua with NSNS non-geometric fluxes, in the framework of β -supergravity. We first provide expressions for the fermionic supersymmetry variations. Specifying a compactification ansatz to four dimensions, we deduce internal Killing spinor equations. These supersymmetry conditions are then reformulated in terms of pure spinors, similarly to standard supergravity vacua admitting an SU(3)×SU(3) structure in Generalized Complex Geometry. The standard d– H ∧ acting on the pure spinors is traded for a generalized Dirac operator D $$ \mathcal{D} $$ , depending here on the non-geometric fluxes. Rewriting it with an exponential of the bivector β leads us to discuss the geometrical characterisation of the vacua in terms of a β -twist, in analogy to the standard twist by the b -field. Thanks to D $$ \mathcal{D} $$ , we also propose a general expression for the superpotential to be obtained from standard supergravities or β -supergravity, and verify its agreement with formulas of the literature. We finally comment on the Ramond-Ramond sector, and discuss a possible relation to intermediate or dynamical SU(2) structure solutions
Irreducible background and interference effects for Higgs-boson production in association with a top-quark pair

We present an analysis of Higgs-boson production in association with a top-quark pair at the LHC investigating in particular the final state consisting of four b jets, two jets, one identified charged lepton and missing energy. We consider the Standard Model prediction in three scenarios, the resonant Higgs-boson plus top-quark-pair production, the resonant production of a top-quark pair in association with a b-jet pair and the full process including all non-resonant and interference contributions. By comparing these scenarios we examine the irreducible background for the production rate and several kinematical distributions. With standard selection criteria the irreducible background turns out to be three times as large as the signal. For most observables we find a uniform deviation of eight percent between the scenario requiring two resonant top quarks and the full process. In particular phase-space regions the non-resonant contributions cause larger effects, and we observe shape changes for some distributions. Furthermore we investigate interference effects and find that neglecting interference contributions results in an over-estimate of the total cross-section of five percent
Unitarity constraints in the standard model with a singlet scalar field

Motivated by the discovery of a new scalar field and amelioration of the electroweak vacuum stability ascribed to a singlet scalar field embedded in the standard model (SM), we examine the implication of the perturbative unitarity in the SM with a singlet scalar field. Taking into account the full contributions to the scattering amplitudes, we derive unitarity conditions on the scattering matrix which can be translated into bounds on the masses of the scalar fields. In the case that the singlet scalar field develops vacuum expectation value (VEV), we get the upper bound on the singlet scalar mass varying with the mixing between the singlet and Higgs scalars. On the other hand, the mass of the Higgs scalar can be constrained by the unitarity condition in the case that the VEV of the singlet scalar is not generated. Applying the upper bound on the Higgs mass to the scenario of the unitarized Higgs inflation, we discuss how the unitarity condition can constrain the Higgs inflation. The singlet scalar mass is not constrained by the unitarity itself when we impose Z 2 in the model because of no mixing with the Higgs scalar. But, regarding the singlet scalar field as a cold dark matter candidate, we derive upper bound on the singlet scalar mass by combining the observed relic abundance with the unitarity condition
Two-twistor particle models and free massive higher spin fields

We present D = 3 and D = 4 world-line models for massive particles moving in a new type of enlarged spacetime, with D −1 additional vector coordinates, which after quantization lead to towers of massive higher spin (HS) free fields. Two classically equivalent formulations are presented: one with a hybrid spacetime/bispinor variables and a second described by a free two-twistor dynamics with constraints. After first quantization in the D = 3 and D = 4 cases, the wave functions satisfying a massive version of Vasiliev’s free unfolded equations are given as functions on the SL(2, ℝ) and SL(2, ℂ) group manifolds respectively, which describe arbitrary on-shell momenta and spin degrees of freedom. Further we comment on the D = 6 case, and possible supersymmetric extensions are mentioned as well. Finally, the description of interactions and the AdS/CFT duality are briefly considered for massive HS fields
Shock waves in Lifshitz-like spacetimes

We construct shock waves for Lifshitz-like geometries in four- and fivedimensional effective theories as well as in D3-D7 and D4-D6 brane systems. The solutions to the domain wall profile equations are found. Further, the study makes a connection with the implications for the quark-gluon plasma formation in heavy-ion collisions. According to the holographic approach, the multiplicity of particles produced in heavy-ion collisions can be estimated by the area of the trapped surface formed in shock wave collisions. We calculate the areas of trapped surfaces in the geometry of two colliding Lifshitz domain walls. Our estimates show that for five-dimensional cases with certain values of the critical exponent the dependence of multiplicity on the energy of colliding ions is rather close to the experimental data ℳ $$ \mathrm{\mathcal{M}} $$ ∼ s 0.15 observed at RHIC and LHC
NLO electroweak automation and precise predictions for W + multijet production at the LHC

We present a fully automated implementation of next-to-leading order electroweak (NLO EW) corrections in the O pen L oops matrix-element generator combined with the Sherpa and M unich Monte Carlo frameworks. The process-independent character of the implemented algorithms opens the door to NLO QCD + EW simulations for a vast range of Standard Model processes, up to high particle multiplicity, at current and future colliders. As a first application, we present NLO QCD + EW predictions for the production of positively charged on-shell W bosons in association with up to three jets at the Large Hadron Collider. At the TeV energy scale, due to the presence of large Sudakov logarithms, EW corrections reach the 20-40% level and play an important role for searches of physics beyond the Standard Model. The dependence of NLO EW effects on the jet multiplicity is investigated in detail, and we find that W + multijet final states feature genuinely different EW effects as compared to the case of W + 1 jet
Infrared behaviour of the one-loop scattering equations and supergravity integrands

The recently introduced ambitwistor string led to a striking proposal for one-loop maximal supergravity amplitudes, localised on the solutions of the ambitwistor one-loop scattering equations. However, these amplitudes have not been explicitly analysed, due to the apparent complexity of the equations that determine the localisation. In this paper we propose an analytic solution to the four-point one-loop scattering equations in the infrared (IR) regime of the amplitude. Using this solution, we compute the ambitwistor integrand and demonstrate that it correctly reproduces the four-graviton integrand in the IR regime. This solution qualitatively extends to n points. To conclude, we explain that the ambitwistor one-loop scattering equations actually correspond to the standard Gross & Mende saddle point
Bi-conformal symmetry and static Green functions in the Schwarzschild-Tangherlini spacetimes

We study a static massless minimally coupled scalar field created by a source in a static D-dimensional spacetime. We demonstrate that the corresponding equation for this field is invariant under a special transformation of the background metric. This transformation consists of the static conformal transformation of the spatial part of the metric accompanied by a properly chosen transformation of the red-shift factor. Both transformations are determined by one function Ω of the spatial coordinates. We show that in a case of higher dimensional spherically symmetric black holes one can find such a bi-conformal transformation that the symmetry of the D-dimensional metric is enhanced after its application. Namely, the metric becomes a direct sum of the metric on a unit sphere and the metric of 2D anti-de Sitter space. The method of the heat kernels is used to find the Green function in this new space, which allows one, after dimensional reduction, to obtain a static Green function in the original space of the static black hole. The general useful representation of static Green functions is obtained in the Schwarzschild-Tangherlini spacetimes of arbitrary dimension. The exact explicit expressions for the static Green functions are obtained in such metrics for D < 6. It is shown that in the four dimensional case the corresponding Green function coincides with the Copson solution
The large level limit of Kazama-Suzuki models

Limits of families of conformal field theories are of interest in the context of AdS/CFT dualities. We explore here the large level limit of the two-dimensional N = 2 , 2 $$ \mathcal{N}=\left(2,\ 2\right) $$ superconformal W n + 1 $$ {\mathcal{W}}_{n+1} $$ minimal models that appear in the context of the supersymmetric higher-spin AdS 3 /CFT 2 duality. These models are constructed as Kazama-Suzuki coset models of the form SU( n + 1) / U( n ). We determine a family of boundary conditions in the limit theories, and use the modular bootstrap to obtain the full bulk spectrum of N = 2 $$ \mathcal{N}=2 $$ super- W n + 1 $$ {\mathcal{W}}_{n+1} $$ primaries in the theory. We also confirm the identification of this limit theory as the continuous orbifold ℂ n / U n $$ {\mathbb{C}}^n/\mathrm{U}(n) $$ that was discussed recently
The so-Kazama-Suzuki models at large level

The large level limit of the N $$ \mathcal{N} $$ = 2 SO(2 N ) Kazama-Suzuki coset models is argued to be equivalent to the orbifold of 4 N free fermions and bosons by the Lie group SO(2 N ) × SO(2). In particular, it is shown that the untwisted sector of the continuous orbifold accounts for a certain closed subsector of the coset theory. Furthermore, the ground states of the twisted sectors are identified with specific coset representations, and this identification is checked by various independent arguments
NLO QCD and electroweak corrections to W + γ production with leptonic W-boson decays

We present a calculation of the next-to-leading-order electroweak corrections to W+γ production, including the leptonic decay of the W boson and taking into account all off-shell effects of the W boson, where the finite width of the W boson is implemented using the complex-mass scheme. Corrections induced by incoming photons are fully included and find particular emphasis in the discussion of phenomenological predictions for the LHC. The corresponding next-to-leading-order QCD corrections are reproduced as well. In order to separate hard photons from jets, a quark-to-photon fragmentation function á la Glover and Morgan is employed. Our results are implemented into Monte Carlo programs allowing for the evaluation of arbitrary differential cross sections. We present integrated cross sections for the LHC at 7 TeV, 8 TeV, and 14 TeV as well as differential distributions at 14 TeV for bare muons and dressed leptons. Finally, we discuss the impact of anomalous W W γ couplings
Exact finite volume expectation values of local operators in excited states

We present a conjecture for the exact expression of finite volume expectation values in excited states in integrable quantum field theories, which is an extension of an earlier conjecture to the case of general diagonal factorized scattering with bound states and a nontrivial bootstrap structure. The conjectured expression is a spectral expansion which uses the exact form factors and the excited state thermodynamic Bethe Ansatz as building blocks. The conjecture is proven for the case of the trace of the energy-moment tensor. Concerning its validity for more general operators, we provide numerical evidence using the truncated conformal space approach. It is found that the expansion fails to be well-defined for small values of the volume in cases when the singularity structure of the TBA equations undergoes a non-trivial rearrangement under some critical value of the volume. Despite these shortcomings, the conjectured expression is expected to be valid for all volumes for most of the excited states, and as an expansion above the critical volume for the rest
One-loop β function of the double sigma model with constant background

The double sigma model with the strong constraints is equivalent to a classical theory of the normal sigma model with one on-shell self-duality relation. The one-form gauge field comes from the boundary term. It is the same as the normal sigma model. The gauge symmetries under the strong constraints are the diffeomorphism and one-form gauge transformation in the double sigma model. These gauge symmetries are also the same as the Dirac-Born-Infeld (DBI) theory. The main task of this work is to compute one-loop β function to obtain the low energy effective theory of the double sigma model. We implement the self-duality relation in the action to perform the one-loop calculation. At last, we obtain the DBI theory. We also rewrite this theory in terms of the generalized metric and scalar dilaton, and define the generalized scalar curvature and tensor from the equations of motion
Holographic vitrification

We establish the existence of stable and metastable stationary black hole bound states at finite temperature and chemical potentials in global and planar four-dimensional asymptotically anti-de Sitter space. We determine a number of features of their holographic duals and argue they represent structural glasses. We map out their thermodynamic landscape in the probe approximation, and show their relaxation dynamics exhibits logarithmic aging, with aging rates determined by the distribution of barriers