Latest in hep-th

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The strong running coupling from the gauge sector of Domain Wall lattice QCD with physical quark massesFeb 21 2019We report on the first computation of the strong running coupling at the physical point (physical pion mass) from the ghost-gluon vertex, computed from lattice simulations with three flavors of Domain Wall fermions. We find $\alpha_{\overline{\rm MS}}(m_Z^2)=0.1172(11)$, ... More
Conformal geometry and (super)conformal higher-spin gauge theoriesFeb 21 2019We develop a manifestly conformal approach to describe linearised (super)conformal higher-spin gauge theories in arbitrary conformally flat backgrounds in three and four spacetime dimensions. Closed-form expressions in terms of gauge prepotentials are ... More
Continuous symmetries and approximate quantum error correctionFeb 20 2019Quantum error correction and symmetry arise in many areas of physics, including many-body systems, metrology in the presence of noise, fault-tolerant computation, and holographic quantum gravity. Here we study the compatibility of these two important ... More
The Inverse Problem for Hawking RadiationFeb 20 2019In this work we study the inverse problem related to the emission of Hawking radiation. We first show how the knowledge of greybody factors of different angular contributions $l$ can be used to constrain the width of the corresponding black hole perturbation ... More
Non-Gaussianity from Entanglement During InflationFeb 20 2019We compute the bi-spectrum of CMB temperature fluctuations for a state where the metric perturbation $\zeta$ is entangled with a spectator scalar field $\chi$. Novel terms in the cubic $\zeta$ action coupled to the scalar can be the dominant contribution ... More
Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion CollisionsFeb 20 2019In this work, the production of photons through binary scattering processes is investigated for equilibrated hadronic systems. More precisely, a non-equilibrium hadronic transport approach to describe relativistic heavy-ion collisions is benchmarked with ... More
Conserved charges in asymptotically de Sitter spacetimesFeb 20 2019We present a covariant phase space construction of hamiltonian generators of asymptotic symmetries with `Dirichlet' boundary conditions in de Sitter spacetime, extending a previous study of J\"ager. We show that the de Sitter charges so defined are identical ... More
Conference Summary of QNP2018Feb 20 2019This report is the summary of the Eighth International Conference on Quarks and Nuclear Physics (QNP2018). Hadron and nuclear physics is the field to investigate ultimate high-density quantum many-body systems bound by strong interactions. It is intended ... More
Charged spherically symmetric NUT and Taub-NUT black hole solutions in quadratic $f(R)$ gravityFeb 20 2019$f(R)$ theory is a modification of Einstein general relativity which has many interesting results in cosmology and astrophysics. To derive solutions for black holes solution in this theory is difficult due to the fact that it is fourth order differential ... More
Domain walls that do not get stuck on impuritiesFeb 19 2019We present a field theoretical model which allows for domain walls that do not get stuck on impurities. For this purpose, we consider a generalized chiral magnet domain wall action with an impurity which couples both to a potential term as well as to ... More
Four-graviton scattering to three loops in ${\mathcal N}=8$ supergravityFeb 19 2019We compute the three-loop scattering amplitude of four gravitons in ${\mathcal N}=8$ supergravity. Our results are analytic formulae for a Laurent expansion of the amplitude in the regulator of dimensional regularisation. The coefficients of this series ... More
Holographic Signatures of Critical CollapseFeb 19 2019Critical phenomena in gravitational collapse exhibit the universal features of self-similarity, critical scaling, and the appearance of a naked singularity. We study critical collapse in AdS, focusing on holographic field theory observables. We demonstrate ... More
A Bound on Thermal Relativistic Correlators at Large Spacelike MomentaFeb 19 2019We consider thermal Wightman correlators in a relativistic quantum field theory in the limit where the spatial momenta of the insertions become large while their frequencies stay fixed. We show that, in this limit, the size of these correlators is bounded ... More
Tropical quantum field theory, mirror polyvector fields, and multiplicities of tropical curvesFeb 19 2019We define a symmetric monoidal category Trop which, roughly, has degrees of tropical curves as its objects and types of tropical curves as its morphisms. A symmetric monoidal functor with domain Trop is what we call a (2D) tropical quantum field theory ... More
Entropies for Coupled Harmonic Oscillators and TemperatureFeb 19 2019We study two entropies of a system composed of two coupled harmonic oscillators which is brought to a canonical thermal equilibrium with a heat-bath at temperature $T$. Using the purity function, we explicitly determine the R\'enyi and van Newmon entropies ... More
BMS Characters and Modular InvarianceFeb 19 2019We construct the characters for the highest weight representations of the 3d Bondi-Metzner-Sachs (BMS$_3$) algebra. We then use these to construct the partition function and show how to use BMS modular transformations to obtain a density of primary states. ... More
DDF operators, open string coherent states and their scattering amplitudesFeb 19 2019We study interactions of string coherent states in the DDF (after Di Vecchia, Del Giudice, Fubini) formalism. For simplicity we focus on open bosonic strings. After reviewing basic properties of DDF operators and of excited open strings, we compute various ... More
The role of the stochastic color field fluctuations on $J/ψ$ suppression in ultra-relativistic heavy-ion collisionsFeb 19 2019We consider the effect of the stochastic color field fluctuations in addition to the collisional as well as the radiative energy losses in the propagation of charm quarks in the hot and dense deconfined medium of quarks and gluons created in ultra-relativistic ... More
Constant curvature holomorphic solutions of the supersymmetric grassmannian sigma model: the case of $G(2,4)$Feb 19 2019We explore the constant curvature holomorphic solutions of the supersymmetric grassmannian sigma model $G(M,N)$ using in particular the gauge invariance of the model. Supersymmetric invariant solutions are constructed via generalizing a known result for ... More
Thermal emission from semi-classical dynamical systemFeb 19 2019Recently the bound on the Lyapunov exponent $\lambda_L \le 2\pi T/ \hbar$ in thermal quantum systems was conjectured by Maldacena, Shenker and Stanford. If we naively apply this bound to a system with a fixed Lyapunov exponent $\lambda_L$, it might predict ... More
Evaporative cooling and self-thermalization in an open system of interacting fermionsFeb 19 2019We study depletion dynamics of an open system of weakly interacting fermions with two-body random interactions. In this model fermions are escaping from the high-energy one-particle orbitals, that mimics the evaporation process used in laboratory experiments ... More
CFTs on curved spacesFeb 19 2019We study conformal field theories (CFTs) on curved spaces including both orientable and unorientable manifolds possibly with boundaries. We first review conformal transformations on curved manifolds. We then compute the identity components of conformal ... More
Massless Rarita-Schwinger field from a divergenceless anti-symmetric-tensor spinor of pure spin-$3/2$Feb 19 2019We construct the Rarita-Schwinger basis vectors, $U^\mu$, spanning the direct product space, $U^\mu:=A^\mu\otimes u_M$, of a massless four-vector, $ A^\mu $, with massless Majorana spinors, $u_M$, together with the associated field-strength tensor, ${\mathcal ... More
Spinning extensions of $D(2,1;α)$ superconformal mechanicsFeb 19 2019As is known, any realization of SU(2) in the phase space of a dynamical system can be generalized to accommodate the exceptional supergroup $D(2,1;\alpha)$, which is the most general $\mathcal{N}{=}\,4$ supersymmetric extension of the conformal group ... More
Absence of Landau-Peierls Instability in the Magnetic Dual Chiral Density Wave Phase of Dense QCDFeb 18 2019We investigate the stability of the Magnetic Dual Chiral Density Wave (MDCDW) phase of cold and dense QCD against collective low-energy fluctuations of the order parameter. The appearance of additional structures in the system free-energy due to the explicit ... More
Charged spherically symmetric black holes in $f(R)$ gravityFeb 18 2019A new class of analytic charged spherically symmetric black hole solutions, which behave asymptotically as flat or (A)dS spacetimes, is derived for specific classes of $f(R)$ gravity, i.e., $f(R)=R-2\alpha\sqrt{R}$ and $f(R)=R-2\alpha\sqrt{R-8\Lambda}$, ... More
Conformal-helicity duality & the Hilbert space of free CFTsFeb 18 2019We identify a means to explicitly construct primary operators of free conformal field theories (CFTs) in spacetime dimensions $d=2,~3$, and $4$. Working in momentum space with spinors, we find that the $N$-distinguishable-particle Hilbert space $\mathcal{H}_N$ ... More
ECO-like behavior in black hole analoguesFeb 18 2019Classical phenomenological aspects of acoustic perturbations on a draining bathtub geometry where a surface with reflectivity $\mathcal{R}$ is set at a small distance from the would-be acoustic horizon, which is excised, are addressed. A low-frequency ... More
Seeing in complete darkness, using the Unruh effectFeb 18 2019We present a new method by which, in principle, it is possible to "see in absolute darkness", i.e., without exchanging any real quanta through quantum fields. This is possible because objects modify the mode structure of the vacuum in their vicinity. ... More
Gravitational perturbations from oscillons and transients after inflationFeb 18 2019We study the scalar and tensor perturbations generated by the fragmentation of the inflaton condensate into oscillons or transients after inflation, using nonlinear classical lattice simulations. Without including the backreaction of metric perturbations, ... More
Lattice-based equation of state at finite baryon number, electric charge and strangeness chemical potentialsFeb 18 2019We construct an equation of state for Quantum Chromodynamics (QCD) at finite temperature and chemical potentials for baryon number $B$, electric charge $Q$ and strangeness $S$. We use the Taylor expansion method, up to the fourth power for the chemical ... More
Supersymmetry anomalies in $\mathcal{N}=1$ conformal supergravityFeb 18 2019We solve the Wess-Zumino consistency conditions of $\mathcal{N}=1$ off-shell conformal supergravity in four dimensions and determine the general form of the superconformal anomalies for arbitrary $a$ and $c$ anomaly coefficients. Besides the well known ... More
Anomalous SupersymmetryFeb 18 2019We show that supersymmetry is anomalous in ${\cal N}=1$ superconformal quantum field theories (SCFTs) with an anomalous R-symmetry. This anomaly was originally found in holographic SCFTs at strong coupling. Here we show that this anomaly is present in ... More
Bulk Locality and Asymptotic Causal DiamondsFeb 18 2019In AdS/CFT, the non-uniqueness of the reconstructed bulk from boundary subregions has motivated the notion of code subspaces. We present some closely related structures that arise in flat space. A useful organizing idea is that of an $asymptotic$ causal ... More
Ultra-peripheral-collision studies in the fixed-target mode with the proton and lead LHC beamsFeb 18 2019We address the physics case related to the studies of ultra-peripheral pH, pPb, PbH, and PbPb collisions in the fixed-target mode at the LHC. In particular, we discuss how one can measure the gluon generalized parton distribution E_g(x,xi,t) in exclusive ... More
A gauge invariant prescription to avoid $γ$-crossing instability in Galileon bounceFeb 18 2019We revisit the evolutions of scalar perturbations in a non-singular Galileon bounce. It is known that the second order differential equation governing the perturbations is numerically unstable at a point called $\gamma$-crossing. This instability is usually ... More
Cardy-like asymptotics of the 4d $\mathcal{N}=4$ index and AdS$_5$ blackholesFeb 18 2019Choi, Kim, Kim, and Nahmgoong have recently pioneered analyzing a Cardy-like limit of the superconformal index of the 4d $\mathcal{N}=4$ theory with complexified fugacities which encodes the entropy of the dual supersymmetric AdS$_5$ blackholes. Here ... More
String Landscape and Fermion MassesFeb 18 2019Besides the string scale, string theory has no parameter except some quantized flux values;and the string theory Landscape is generated by scanning over discrete values of all the flux parameters present. We propose that a typical (normalized) probability ... More
Bosonization with background $U(1)$ gauge fieldFeb 18 2019Bosonization is one of the most significant frameworks to analyze fermionic systems. In this work, we propose a new bosonization of Dirac fermion coupled with $U(1)$ background gauge field consistent with gauge invariance, global chiral anomaly matching ... More
Entropy Generation at the Horizon Diffuses Cosmological Constant in 2d de Sitter SpaceFeb 18 2019We investigate a solution of the exactly renormalized Liouville action to foresee the fate of the 2-dimensional de Sitter space. We work in the semiclassical region with a large matter central charge $c$. Instead of de Sitter expansion, it performs a ... More
Bounce cosmology in generalized modified gravitiesFeb 18 2019We investigate the bounce realization in the framework of generalized modified gravities arising from Finsler and Finsler-like geometry. In particular, the richer intrinsic geometrical structure is reflected in the appearance of extra degrees of freedom ... More
Relativistic Quantum Kinetic Theory for Massive Fermions and Spin EffectsFeb 18 2019We present the complete first order relativistic quantum kinetic theory with spin for massive fermions derived from the Wigner function formalism in a concise form that shows explicitly how the 32 Wigner equations reduce to 4 independent transport equations. ... More
No-go theorem for asymptotically AdS static regular boson starsFeb 18 2019In a recent paper, Hod has proven no-go theorem for asymptotically flat static regular boson stars. In the present work, we extend discussions to the gravity with a negative cosmological constant. In the asymptotically AdS background, we show that spherically ... More
WdW-patches in AdS$_{3}$ and complexity change under conformal transformations IIFeb 18 2019We study the null-boundaries of Wheeler-de Witt (WdW) patches in three dimensional Poincare-AdS, when the selected boundary timeslice is an arbitrary (non-constant) function, presenting some useful analytic statements about them. Special attention will ... More
Interacting two-particle states in the symmetric phase of the chiral Nambu--Jona-Lasinio modelFeb 18 2019The renormalisation group flow of the chiral Nambu--Jona-Lasinio (NJL) model with one fermion flavor is mapped out in the symmetric phase with the help of the Functional Renormalisation Group (FRG) method using a physically motivated non-local trial effective ... More
Thermodynamics and weak cosmic censorship conjecture in extended phase spaces of anti-de Sitter black holes with fermions' absorptionFeb 18 2019The thermodynamics and weak cosmic censorship conjecture in extended phase spaces of anti-de Sitter black holes where the cosmological constant is seen as a pressure with a conjugate volume are investigated by fermions' absorption. The first law of thermodynamics ... More
Chaos in the FishnetFeb 18 2019We consider the computation of out-of-time-ordered correlators (OTOCs) in the fishnet theories, with a mass term added. These fields theories are not unitary. We compute the growth exponent, in the planar limit, at any value of the coupling and show that ... More
Light front QED, Stueckelberg field and Infrared divergenceFeb 18 2019Stueckelberg mechanism introduces a scalar field, known as Stueckelberg field, so that gauge symmetry is preserved in the massive abelian gauge theory. In this work, we show that the role of the Stueckelberg field is similar to the Kulish and Faddeev ... More
Gravitational Searches for Lorentz Violation with Ultracold NeutronsFeb 18 2019We investigate the consequences of Lorentz violation (as expressed within the gravity sector of the Standard-Model Extension) upon the gravitational quantum states of ultracold neutrons (UCNs). Since our main aim is to compare our theoretical results ... More
Mean field and two-body nuclear effects in inclusive electron scattering on argon, carbon and titanium: the superscaling approachFeb 17 2019We compare the predictions of the SuSAv2 model including two-particle two-hole meson-exchange currents with the recent JLab data for inclusive electron scattering on three different targets (C, Ar and Ti). The agreement is very good over the full energy ... More
$\mathcal{N}=4$ Super-Yang-Mills Correlators at Strong Coupling from String Theory and LocalizationFeb 17 2019We compute $1/\lambda$ corrections to the four-point functions of half-BPS operators in $SU(N)$ $\mathcal{N}=4$ super-Yang-Mills theory at large $N$ and large 't Hooft coupling $\lambda=g_\text{YM}^2 N$ using two methods. Firstly, we relate integrals ... More
Physicists' $d=3+1$, $N=1$ superspace-time and supersymmetric QFTs from a tower construction in complexified ${\Bbb Z}/2$-graded $C^\infty$-Algebraic Geometry and a purge-evaluation/index-contracting mapFeb 17 2019The complexified ${\Bbb Z}/2$-graded $C^\infty$-Algebraic Geometry aspect of a superspace(-time) $\widehat{X}$ in Sec.\,1 of D(14.1) (arXiv:1808.05011 [math.DG]) together with the Spin-Statistics Theorem in Quantum Field Theory, which requires fermionic ... More
An in-medium chiral power counting for nuclear matter and some applicationsFeb 16 2019We review on a chiral power counting for in-medium chiral perturbation theory with nucleons and pions as explicit degrees of freedom coupled to external sources. It allows for a systematic expansion including both local and pion-mediated inter-nucleon ... More
A C*-algebraic approach to interacting quantum field theoriesFeb 16 2019A novel C*-algebraic framework is presented for relativistic quantum field theories, fixed by a Lagrangean. It combines the postulates of local quantum physics, encoded in the Haag-Kastler axioms, with insights gained in the perturbative approach to quantum ... More
Fermion Conformal Bootstrap in 4dFeb 15 2019We apply numerical conformal bootstrap techniques to the four-point function of a Weyl spinor in 4d non-supersymmetric CFTs. We find universal bounds on operator dimensions and OPE coefficients, including bounds on operators in mixed symmetry representations ... More
All-loop cuts from the AmplituhedronFeb 15 2019The definition of the amplituhedron in terms of sign flips involves both one-loop constraints and the "mutual positivity" constraint. To gain an understanding of the all-loop integrand of $\mathcal{N}=4$ sYM requires understanding the crucial role played ... More
The Axidental UniverseFeb 15 2019Theories with several hundred axion fields have enormous numbers of distinct meta-stable minima. A small fraction of these local minima have vacuum energy compatible with current measurements of dark energy. The potential also contains regions suitable ... More
Five-dimensional scale-dependent black holes with constant curvature and Solv horizonsFeb 15 2019In this work, we investigate five--dimensional scale--dependent black hole solutions by modelling their event horizon with some of the eight Thurston three--dimensional geometries. Specifically, we construct constant curvature scale--dependent black holes ... More
Multi-stage jet evolution through QGP using the JETSCAPE framework: inclusive jets, correlations and leading hadronsFeb 15 2019The JETSCAPE Collaboration has recently announced the first release of the JETSCAPE package that provides a modular, flexible, and extensible Monte Carlo event generator. This innovative framework makes it possible to perform a comprehensive study of ... More
Non-local Lagrangians from Renormalons and Analyzable FunctionsFeb 15 2019We embed in a generalized Borel procedure the notion of renormalization and renormalons. While there are several efforts in literature to have a semi-classical understanding of the renormalons, here we argue that this is not the fundamental issue and ... More
Anisotropic $2$-form dark energyFeb 15 2019We study the dynamics of dark energy in the presence of a 2-form field coupled to a canonical scalar field $\phi$. We consider the coupling proportional to $e^{-\mu \phi/M_{\rm pl}} H_{\alpha \beta \gamma}H^{\alpha \beta \gamma}$ and the scalar potential ... More
Causally neutral quantum physicsFeb 15 2019In fundamental theories that accounts for quantum gravitational effects, the spacetime causal structure is expected to be quantum uncertain. Previous studies of quantum causal structure focused on finite-dimensional systems. Here we present an algebraic ... More
Feynman's different approach to electrodynamicsFeb 15 2019We discuss a previously unpublished description of electromagnetism developed by Richard P. Feynman in the 1960s. Though similar to the existing approaches deriving electromagnetism from special relativity, the present one extends a long way towards the ... More
Easy-plane QED$_3$'s in the large $N_f$ limitFeb 15 2019We consider Quantum Electrodynamics in $2{+}1$ dimensions with $N_f$ fermionic or bosonic flavors, allowing for interactions that respect the global symmetry $U(N_f/2)^2$. There are four bosonic and four fermionic fixed points, which we analyze using ... More
Spontaneous scalarization of charged black holes at the approach to extremalityFeb 15 2019We study static, spherically symmetric and electrically charged black hole solutions in a quadratic Einstein-scalar-Gauss-Bonnet gravity model. Very similar to the uncharged case, black holes undergo spontaneous scalarization for sufficiently large scalar-tensor ... More
Open-string singlet interaction as pomeron in elastic $pp, p\bar{p}$ scatteringFeb 15 2019We consider contributions of the open-string singlet~(OSS) interaction to the proton-proton scattering. Modelling baryon and meson as instanton and open string in the effective QCD string model, the typical pomeron is identified with a massive spin-2 ... More
Minimal gauge invariant and gauge fixed actions for massive higher-spin fieldsFeb 15 2019Inspired by the rich structure of covariant string field theory, we propose a minimal gauge invariant action for general massive integer spin $n$ field. The action consists of four totally symmetric tensor fields of order respectively n, n-1, n-2 and ... More
Quantum Information Capsule in Multiple-Qudit Systems and Continuous-Variable SystemsFeb 15 2019Quantum correlations in an entangled many-body system are capable of storing information. Even when the information is injected by a local unitary operation to the system, the entanglement delocalizes it. In a recent study on multiple-qubit systems, it ... More
The Higgs Trilinear Coupling and the Scale of New PhysicsFeb 14 2019We consider modifications of the Higgs potential due to new physics at high energy scales. These upset delicate cancellations predicted by the Standard Model for processes involving Higgs bosons and longitudinal gauge bosons, and lead to a breakdown of ... More
Mirror Symmetry and Partition FunctionsFeb 14 2019Localization methods have produced explicit expressions for the sphere partition functions of (2,2) superconformal field theories. The mirror symmetry conjecture predicts an IR duality between pairs of Abelian gauged linear sigma models, a class of which ... More
A Web of 2d Dualities: ${\bf Z}_2$ Gauge Fields and Arf InvariantsFeb 14 2019We describe a web of well-known dualities connecting quantum field theories in $d=1+1$ dimensions. The web is constructed by gauging ${\bf Z}_2$ global symmetries and includes a number of perennial favourites such as the Jordan-Wigner transformation, ... More
Deep Learning the Hyperbolic Volume of a KnotFeb 14 2019An important conjecture in knot theory relates the large-$N$, double scaling limit of the colored Jones polynomial $J_{K,N}(q)$ of a knot $K$ to the hyperbolic volume of the knot complement, $\text{Vol}(K)$. A less studied question is whether $\text{Vol}(K)$ ... More
Holomorphic Lagrangian subvarieties in holomorphic symplectic manifolds with Lagrangian fibrations and special Kahler geometryFeb 14 2019Let $M$ be a holomorphic symplectic K\"ahler manifold equipped with a Lagrangian fibration $\pi$ with compact fibers. The base of this manifold is equipped with a special K\"ahler structure, that is, a K\"ahler structure $(I, g, \omega)$ and a symplectic ... More
Exact relativistic Green's functions for the time-independent potentialsFeb 14 2019Relativistic formalism of Green's functions is dicussed in QCD and QED,where the relativistic Green's functions are constructed using the Schwinger proper time formalism and the Fock-Feynman-Schwinger method.As a result a simple and exact method is found ... More
Lorentz violation and Gravitoelectromagnetism: Casimir effect and Stefan-Boltzmann law at Finite temperatureFeb 14 2019The standard model and general relativity are local Lorentz invariants. However it is possible that at Planck scale there may be a breakdown of Lorentz symmetry. Models with Lorentz violation are constructed using Standard Model Extension (SME). Here ... More
Baryon-number violation by two units and the deuteron lifetimeFeb 14 2019We calculate the lifetime of the deuteron with dimension-nine quark operators that violate baryon number by two units. We construct an effective field theory for $|\Delta B|=2$ interactions that give rise to neutron-antineutron ($n$-$\bar{n}$) oscillations ... More
Platonic Field TheoriesFeb 14 2019We study renormalization group (RG) fixed points of scalar field theories endowed with the discrete symmetry groups of regular polytopes. We employ the functional perturbative renormalization group (FPRG) approach and the $\epsilon$-expansion in $d=d_c-\epsilon$. ... More
Supersymmetric Dyonic Strings in 6-Dimensions from 3-DimensionsFeb 14 2019It was shown in arXiv:1410.7168 that compactifying $D=6$, $\mathcal{N}=(1,0)$ ungauged supergravity coupled to a single tensor multiplet on S$^3$ one gets a particular $D=3$, $\mathcal{N}=4$ gauged supergravity which is a consistent reduction. We construct ... More
Supersymmetric Dyonic Strings in 6-Dimensions from 3-DimensionsFeb 14 2019Feb 18 2019It was shown in arXiv:1410.7168 that compactifying $D=6$, $\mathcal{N}=(1,0)$ ungauged supergravity coupled to a single tensor multiplet on S$^3$ one gets a particular $D=3$, $\mathcal{N}=4$ gauged supergravity which is a consistent reduction. We construct ... More
Spectral Action in Noncommutative GeometryFeb 14 2019What is spectral action, how to compute it and what are the known examples? This book offers a guided tour through the mathematical habitat of noncommutative geometry \`a la Connes, deliberately unveiling the answers to these questions. After a brief ... More
Cosmic Inflation: Trick or Treat?Feb 14 2019Discovered almost forty years ago, inflation has become the leading paradigm for the early universe. Originally invented to avoid the fine-tuning puzzles of the standard model of cosmology, the so-called hot Big Bang phase, inflation has always been the ... More
First order dissipative hydrodynamics from an effective covariant kinetic theoryFeb 14 2019The first order hydrodynamic evolution equations for the shear stress tensor, the bulk viscous pressure and the charge current have been studied for a system of quarks and gluons, with a non-vanishing quark chemical potential and finite quark mass. The ... More
Cosmic Evolution of Holographic Dark Energy in f(\mathcal{G},T) GravityFeb 14 2019The aim of this paper is to analyze the cosmological evolution of holographic dark energy in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet invariant and trace of the energy-momentum tensor, respectively). We reconstruct ... More
Conformal equations that are not Virasoro or Weyl invariantFeb 14 2019While the argument by Zamolodchikov and Polchinski suggests global conformal invariance implies Virasoro invariance in two-dimensional unitary conformal field theories with discrete dilatation spectrum, it is not the case in more general situations without ... More
Reggeized model for $γp \to K^{*+} Λ$Feb 14 2019The high-precision differential cross-section data for the reaction $\gamma p \to K^{*+}\Lambda$ are re-analyzed within a Regge-inspired effective Lagrangian approach. The model adopts Regge phenomenology to constrain the $t$-channel contributions from ... More
Coherent dibaryonsFeb 14 2019There are encouraging evidences for registration of excitations of quark oscillator levels in compressed 2-nucleon systems, which were hidden in two independently published experimental works for many years. Data obtained by EVA collaboration can be considered ... More
No-go theorem for static boson starsFeb 14 2019It is proved that self-gravitating static scalar fields whose self-interaction potential $V(\psi^2)$ is a monotonically increasing function of its argument cannot form spherically symmetric asymptotically flat bound matter configurations. Our compact ... More
4d-3d-2d Index and Dualities in Bulk-Boundary-CornerFeb 14 2019We compute supersymmetric indices which count local operators at certain half-BPS interfaces and quarter-BPS junctions of interfaces in four-dimensional $\mathcal{N}=4$ Super Yang-Mills theory. We use the indices as very stringent tests of a variety of ... More
Constraints on nuclear parton distributions from dijet photoproduction at the LHCFeb 13 2019Using QCD calculations of the cross section of inclusive dijet photoproduction in Pb-Pb ultraperipheral collisions in the LHC kinematics as pseudo-data, we study the effect of including these data using the Bayesian reweighting technique on nCTEQ15, nCTEQ15np, ... More
Unitarity of Singh-Hagen model in $D$ dimensionsFeb 13 2019The particle content of the Singh-Hagen model ($SH$) in $D$ dimensions is revisited. We suggest a complete set of spin-projection operators acting on totally symmetric rank-3 fields. We give a general expression for the propagator and determine the coefficients ... More
Energy in Gravitation and Noether's TheoremsFeb 13 2019I exhibit the conflicting roles of Noether's two great theorems in defining conserved quantities, especially Energy in General Relativity and its extensions: It is the breaking of coordinate invariance through boundary conditions that removes the barrier ... More
Equation of state at finite densities for QCD matter in nuclear collisionsFeb 13 2019We construct the QCD equation of state at finite chemical potentials including net baryon, electric charge, and strangeness, based on the conserved charge susceptibilities determined from lattice QCD simulations and the equation of state of the hadron ... More
Cosmological perturbations in the Regge-Wheeler formalismFeb 13 2019We study linear perturbations of the Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model in the Regge-Wheeler formalism which is a standard framework to study perturbations of spherically-symmetric black holes. In particular, we show that the ... More
Diffractive Dijet Production and Wigner Distributions from the Color Glass CondensateFeb 13 2019Experimental processes that are sensitive to parton Wigner distributions provide a powerful tool to advance our understanding of proton structure. In this work, we compute gluon Wigner and Husimi distributions of protons within the Color Glass Condensate ... More
Spontaneous scalarisation of charged black holes: coupling dependence and dynamical featuresFeb 13 2019Spontaneous scalarisation of electrically charged, asymptotically flat Reissner-Nordstr\"om black holes (BHs) has been recently demonstrated to occur in Einstein-Maxwell-Scalar (EMS) models. EMS BH scalarisation presents a technical simplification over ... More
Matter dependence of the four-loop QCD cusp anomalous dimension: from small angles to all anglesFeb 13 2019We compute the fermionic contributions to the cusp anomalous dimension in QCD at four loops as an expansion for small cusp angle. As a byproduct we also obtain the respective terms of the four-loop HQET wave function anomalous dimension. Our new results ... More
Black hole microstate counting in Type IIB from 5d SCFTsFeb 13 2019We use recently established AdS$_6$/CFT$_5$ dualities to count the microstates of magnetically charged AdS$_6 \times S^2 \times \Sigma$ black holes in Type IIB. The near-horizon limit is described by solutions with AdS$_2 \times \Sigma_{\mathfrak{g}_1} ... More
Relevant perturbation of entanglement entropy of singular surfacesFeb 13 2019We study the entanglement entropy of theories that are derived from relevant perturbation of given CFTs for regions with a singular boundary by using the AdS/CFT correspondence. In the smooth case, it is well known that a relevant deformation of the boundary ... More
Quenching of hadron spectra in XeXe and PbPb collisions at the LHCFeb 13 2019The $p_\perp$ dependence of the nuclear modification factor $R_{\text{AA}}$ measured in PbPb collisions at the LHC exhibits a universal shape, which can be very well reproduced in a simple energy loss model based on the BDMPS medium-induced gluon spectrum. ... More
A quasi-matter bounce equivalent to Starobinsky inflationFeb 13 2019In this paper we construct a bounce model that mimics the Starobinsky inflationary model. Our construction relies on Wands' duality, which shows that the Mukhanov-Sasaki equation has a symmetry transformation by changing appropriately its time-dependent ... More