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  • Rectifying Einstein-Gauss-Bonnet inflation in view of GW170817
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-07
    S.D. Odintsov; V.K. Oikonomou; F.P. Fronimos

    In this work we introduce a new theoretical framework for Einstein-Gauss-Bonnet theories of gravity, which results to particularly elegant, functionally simple and transparent gravitational equations of motion, slow-roll indices and the corresponding observational indices. The main requirement is that the Einstein-Gauss-Bonnet theory has to be compatible with the GW170817 event, so the gravitational

    更新日期:2020-08-14
  • LREE of a Dynamical Unstable Dp-brane
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-14
    Shirin Teymourtashlou; Davoud Kamani

    We derive the left-right entanglement entropy (LREE) for a bosonic Dp-brane. This brane has tangential dynamics and has been dressed by a U(1) gauge potential, the Kalb-Ramond field and a tachyon field. For this purpose, the Rényi entropy will be computed and then, by taking a special limit of it, the LREE will be obtained. Besides, the behavior of the LREE under the tachyon condensation process will

    更新日期:2020-08-14
  • Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-10
    Hamzeh Khanpour

    Our main aim in this paper is to present detailed studies to probe the top quark flavor changing neutral current (FCNC) interactions at tqg, tqγ, tqH and tqZ(σμν,γμ) vertices in the triple-top signal pp→tt¯t(t¯tt¯) at the high energy proposal of Large Hadron Collider (HE-LHC) and future circular hadron-hadron collider (FCC-hh). To this end, we investigate the production of three top quarks which arises

    更新日期:2020-08-14
  • Particles, string and interface in the three-dimensional Ising model
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-05
    Gesualdo Delfino; Walter Selke; Alessio Squarcini

    We consider the three-dimensional Ising model slightly below its critical temperature, with boundary conditions leading to the presence of an interface. We show how the interfacial properties can be deduced starting from the particle modes of the underlying field theory. The product of the surface tension and the correlation length yields the particle density along the string whose propagation spans

    更新日期:2020-08-12
  • AGT basis in SCFT for c = 3/2 and Uglov polynomials
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-30
    Vladimir Belavin; Abay Zhakenov

    AGT allows one to compute conformal blocks of d = 2 CFT for a large class of chiral CFT algebras. This is related to the existence of a certain orthogonal basis in the module of the (extended) chiral algebra. The elements of the basis are eigenvectors of a certain integrable model, labeled in general by N-tuples of Young diagrams. In particular, it was found that in the Virasoro case these vectors

    更新日期:2020-08-10
  • Tunneling of massless and massive particles from a quantum deformed Schwarzschild black hole surrounded by quintessence
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-10
    Sareh Eslamzadeh; Kourosh Nozari

    We study radiation of a quantum deformed Schwarzschild black hole surrounded by a quintessence field, through a tunneling process. When the background spacetime of a black hole is covered by a scalar field, such as a quintessence field, metric of the black hole changes for a particular range of the mass. Then, the geometry of the Schwarzschild black hole with one black hole horizon converts to geometry

    更新日期:2020-08-10
  • Probing flavor structure of cosmic ray e∓ spectrum and implications for dark matter indirect searches
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-10
    Shao-Feng Ge; Hong-Jian He; Yu-Chen Wang; Qiang Yuan

    Measuring high energy cosmic ray electrons/positrons (CRE) provides important means for the dark matter (DM) indirect detection and for probing the nearby galactic sources. In this work, we perform a systematic analysis of the flavor structure of DM annihilations into charged leptons based on the cosmic ray CRE spectra measured by DAMPE, Fermi-LAT, AMS-02, and CALET experiments. We study the annihilations

    更新日期:2020-08-10
  • A note on 4d N=3 from little string theory
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-31
    Antonio Amariti; Gianmarco Formigoni

    We study little string theory (LST) compactified on T2, partially breaking supersymmetry by a discrete T-duality twist acting on both the Kähler and the complex structure of the torus. This setup gives raise to 4d N=3 models and it can be performed in both the type IIA and type IIB LSTs. We comment on the relation with other constructions proposed in the literature.

    更新日期:2020-08-08
  • The 7% rule: A maximum entropy prediction on new decays of the Higgs boson
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-07
    Alexandre Alves; Alex Gomes Dias; Roberto da Silva

    The entropy of the Higgs boson decay probabilities distribution in the Standard Model (SM) is maximized for a Higgs mass value that is less than one standard deviation away from the current experimental measurement. This successful estimate of the Higgs mass encourages us to propose tests of the Maximum Entropy Principle (MEP) as a tool for theoretical inferences in other instances of Higgs physics

    更新日期:2020-08-08
  • Comments on defining entanglement entropy
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-30
    Jennifer Lin; Đorđe Radičević

    We revisit the issue of defining the entropy of a spatial region in a broad class of quantum theories. In theories with explicit regularizations, working within an elementary but general algebraic framework applicable to matter and gauge theories alike, we give precise path integral expressions for three known types of entanglement entropy that we call full, distillable, and gauge-invariant. For a

    更新日期:2020-08-06
  • Asymmetric CFTs arising at the IR fixed points of RG flows
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-08-05
    George Georgiou; Georgios Pappas; Konstantinos Sfetsos

    We construct a generalization of the cyclic λ-deformed models of [10] by relaxing the requirement that all the WZW models should have the same level k. Our theories are integrable and flow from a single UV point to different IR fixed points depending on the different orderings of the WZW levels ki. First we calculate the Zamolodchikov's C-function for these models as exact functions of the deformation

    更新日期:2020-08-05
  • One-loop corrections to the Zbb¯ vertex in models with scalar doublets and singlets
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-27
    Duarte Fontes; Luís Lavoura; Jorge C. Romão; João P. Silva

    We study the one-loop corrections to the Zbb¯ vertex in extensions of the Standard Model with arbitrary numbers of scalar doublets, neutral scalar singlets, and charged scalar singlets. Starting with a general parameterization of theories with neutral and singly-charged scalar particles, we derive the conditions that, in a renormalizable model, must be obeyed by the couplings in order for the divergent

    更新日期:2020-08-04
  • Photo-production of the Higgs boson at the LHeC
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-29
    Ruibo Li; Xiang Lv; Bo-Wen Wang; Kai Wang; Tao Xu

    As one category of vector boson fusion, photo-production is one important production mechanism at e-p colliders. A future e-p collider – Large Hadron-electron Collider (LHeC) has been discussed as a “Higgs factory” candidate where the Higgs boson produced via weak boson fusion (WBF) at the LHeC plays an important role in precision measurement of Yukawa couplings. On the other hand, a measurement of

    更新日期:2020-08-03
  • Non-perturbative defect one-point functions in planar N=4 super-Yang-Mills
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-28
    Shota Komatsu; Yifan Wang

    The four dimensional N=4 super-Yang-Mills (SYM) theory exhibits rich dynamics in the presence of codimension-one conformal defects. The new structure constants of the extended operator algebra consist of one-point functions of local operators which are nonvanishing due to the defect insertion and carry nontrivial coupling dependence. We study an important class of half-BPS superconformal defects engineered

    更新日期:2020-08-03
  • Grand pleromal transmutation: UV condensates via Konishi anomaly, dimensional transmutation and ultraminimal GUTs
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-27
    Charanjit S. Aulakh

    Using consistency requirements relating chiral condensates imposed by the so called Generalized Konishi Anomaly, we show that dimensional transmutation via gaugino condensation in the ultraviolet drives gauge symmetry breaking in a large class of asymptotically strong Super Yang Mills Higgs theories. For Adjoint multiplet type chiral superfields Φ (transforming as r×r¯ representations of a non Abelian

    更新日期:2020-07-31
  • KdV charges and the generalized torus partition sum in TT‾ deformation
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-27
    Meseret Asrat

    We consider KdV currents in a quantum field theory obtained by deforming a two dimensional conformal field theory via the irrelevant operator TT‾. In this paper we determine their torus one–point functions modular properties. We find that the one–point functions decompose into a direct sum of two non–holomorphic modular forms. We also obtain a general differential equation that the KdV generalized

    更新日期:2020-07-31
  • Semiclassical dynamics for torsional Newton-Cartan strings
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-28
    Dibakar Roychowdhury

    We explore folded spinning string configurations over torsional Newton Cartan (TNC) geometry with R×S2 topology within the semiclassical approximation. We consider the large c and/or nonrelativistic (NR) limit associated with the world-sheet d.o.f. and compute the one loop stringy corrections to the energy spectrum in the dual Spin Matrix Theory (SMT) theory in the limit of strong (g≫1) coupling.

    更新日期:2020-07-31
  • Stability, enhanced gauge symmetry and suppressed cosmological constant in 9D heterotic interpolating models
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-20
    H. Itoyama; Sota Nakajima

    We investigate the structure of the moduli space of 9D heterotic interpolating models with a complete set of Wilson line backgrounds and a radius parameter by computing the one-loop partition functions and the cosmological constants and by deriving the massless spectra, paying attention to the region a≈0 where supersymmetry is asymptotically restoring. We find some special planes and points in the

    更新日期:2020-07-28
  • The momentum spaces of κ-Minkowski noncommutative spacetime
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-23
    Fedele Lizzi; Mattia Manfredonia; Flavio Mercati

    A useful concept in the development of physical models on the κ-Minkowski noncommutative spacetime is that of a curved momentum space. This structure is not unique: several inequivalent momentum space geometries have been identified. Some are associated to a different assumption regarding the signature of spacetime (i.e. Lorentzian vs. Euclidean), but there are inequivalent momentum spaces that can

    更新日期:2020-07-28
  • Bk spin vertex models and quantum algebras
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-21
    Doron Gepner

    We construct new solvable vertex models based on the spin representation of the Lie algebra Bk. We use these models to study the algebraic structure underlying such vertex theories. We show that all the Bk spin vertex models obey a version of the BMW algebra along with extra relations that are called n–CB (conformal braiding) algebras. These algebras were discussed before for various IRF (interaction

    更新日期:2020-07-24
  • Towards Lagrangian construction for infinite half-integer spin field
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-16
    I.L. Buchbinder; S. Fedoruk; A.P. Isaev; V.A. Krykhtin

    We formulate the conditions for the generalized fields in the space with additional commuting Weyl spinor coordinates which define the infinite half-integer spin representation of the four-dimensional Poincaré group. Using this formulation we develop the BRST approach and derive the Lagrangian for the half-integer infinite spin fields.

    更新日期:2020-07-21
  • Measuring entangled neutrino states in a toy model QFT
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-10
    Hosam Mohammed; Jarah Evslin; Emilio Ciuffoli

    Localized wave packet treatments of neutrino oscillations by various groups lead to mutually inconsistent predictions. The neutrino wave packet description arises as an approximate substitute for the evolution of an entangled state which is not localized. The disagreements arise from qualitative differences in the framework which are not specific to electroweak interactions, and so have analogues in

    更新日期:2020-07-15
  • Infinite black hole entropies at infinite distances and tower of states
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-10
    Quentin Bonnefoy; Luca Ciambelli; Dieter Lüst; Severin Lüst

    The aim of this paper is to elucidate a close connection between the black hole area law and the infinite distance conjecture in the context of the swampland. We consider families of black hole geometries, parametrized by their event horizon areas or by the values of their entropies, and show that the infinite entropy limit is always at infinite distance in the space of black hole geometries. It then

    更新日期:2020-07-15
  • A hairy box in three dimensions
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-13
    Chethan Krishnan; Rohit Shekhar; P.N. Bala Subramanian

    In this short note, we consider the phases of gravity coupled to a U(1) gauge field and charged scalar in 2+1 dimensions without a cosmological constant, but with box boundary conditions. This is an extension of the results in arXiv:1609.01208, but unlike in higher dimensions, here the physics has sharp differences from the corresponding AdS problem. This is because Einstein-Maxwell black holes cease

    更新日期:2020-07-15
  • Cosmological string backgrounds from super Poisson-Lie T-plurality
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-10
    Ali Eghbali

    We generalize the formulation of Poisson-Lie (PL) T-plurality proposed by R. von Unge (2002) [6] from Lie groups to Lie supergroups. By taking a convenient ansatz for metric of the σ-model in terms of the left-invariant one-forms of the isometry Lie supergroups (C3+A) and GL(1|1) we construct cosmological string backgrounds, including (2+1|2)-dimensional metric, time-dependent dilaton and vanishing

    更新日期:2020-07-15
  • Integrability of spin-12 fermions with charge pairing and Hubbard interaction
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-07
    M.J. Martins

    In this paper we study the exact solution of a one-dimensional model of spin-12 electrons composed by a nearest-neighbor triplet pairing term and the on-site Hubbard interaction. We argue that this model admits a Bethe ansatz solution through a mapping to a Hubbard chain with imaginary kinetic hopping terms. The Bethe equations are similar to that found by Lieb and Wu [3] but with additional twist

    更新日期:2020-07-14
  • Correspondences among CFTs with different W-algebra symmetry
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-03
    Thomas Creutzig; Naoki Genra; Yasuaki Hikida; Tianshu Liu

    W-algebras are constructed via quantum Hamiltonian reduction associated with a Lie algebra g and an sl(2)-embedding into g. We derive correspondences among correlation functions of theories having different W-algebras as symmetry algebras. These W-algebras are associated to the same g but distinct sl(2)-embeddings. For this purpose, we first explore different free field realizations of W-algebras and

    更新日期:2020-07-13
  • Lepton flavor mixing and CP violation in the minimal type-(I+II) seesaw model with a modular A4 symmetry
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-03
    Xin Wang

    In this paper, we study the implications of the modular A4 flavor symmetry in constructing a supersymmetric minimal type-(I+II) seesaw model, in which only one right-handed neutrino and two Higgs triplets are introduced to account for the tiny neutrino masses, flavor mixing and CP violation. We consider the most economical case where the right-handed neutrino and the Higgs triplets in this model are

    更新日期:2020-07-13
  • Quantifying multinucleon effect in Argon using high-pressure TPC
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-01
    Jaydip Singh; Srishti Nagu; Jyotsna Singh; R.B. Singh

    Neutrino oscillation experiments use heavy nuclear targets to achieve sufficient interaction rates. Nuclear effects are introduced in the experimental environment by the use of these targets and need to be quantified as they add to the systematic errors. In the low energy region (around 1 GeV) multinucleon events are also present along with Quasi Elastic (QE) and Delta interactions. Therefore if these

    更新日期:2020-07-13
  • Lessons from eclectic flavor symmetries
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-02
    Hans Peter Nilles; Saúl Ramos–Sánchez; Patrick K.S. Vaudrevange

    A top-down approach to the flavor problem motivated from string theory leads to the concept of eclectic flavor groups that combine traditional and modular flavor symmetries. To make contact with models constructed in the bottom-up approach, we analyze a specific example based on the eclectic flavor group Ω(1) (a nontrivial combination of the traditional flavor group Δ(54) and the finite modular group

    更新日期:2020-07-13
  • Correlation functions of integrable O(n) spin chains
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-08
    G.A.P. Ribeiro

    We study the correlation functions of the integrable O(n) spin chain in the thermodynamic limit. We addressed the problem of solving functional equations of the quantum Knizhnik Zamolodchikov type for density matrix related to the O(n) spin chain. We give the explicit solution for two-sites density matrix elements for the O(n) which are then evaluated for the n=3,4,…,8 cases at zero temperature.

    更新日期:2020-07-13
  • Symmetric separation of variables for trigonometric integrable models
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-29
    T. Skrypnyk

    We study a problem of variable separation for the classical integrable hamiltonian systems possessing Lax matrices satisfying linear r-matrix algebra with skew-symmetric sl(2)⊗sl(2)-valued trigonometric r-matrix. For all such the systems we produce new symmetric variables of separation. We show that the corresponding curve of separation differs from the spectral curve of the initial Lax matrix. The

    更新日期:2020-07-10
  • Gauge dependence of alternative flow equation for the functional renormalization group
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-07-10
    Peter M. Lavrov

    The gauge dependence problem of alternative flow equation for the functional renormalization group is studied. It is shown that the effective two-particle irreducible effective action depends on gauges at any value of IR parameter k. The situation with gauge dependence is similar to the standard formulation based on the effective one-particle irreducible average action.

    更新日期:2020-07-10
  • On the stability of open-string orbifold models with broken supersymmetry
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-27
    Steven Abel; Thibaut Coudarchet; Hervé Partouche

    We consider an open-string realisation of N=2→N=0 spontaneous breaking of supersymmetry in four-dimensional Minkowski spacetime. It is based on type IIB orientifold theory compactified on T2×T4/Z2, with Scherk–Schwarz supersymmetry breaking implemented along T2. We show that in the regions of moduli space where the supersymmetry breaking scale is lower than the other scales, there exist configurations

    更新日期:2020-07-03
  • Dirac neutrinos from Peccei-Quinn symmetry: Two examples
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-26
    Leon M.G. de la Vega; Newton Nath; Eduardo Peinado

    We aim to explain the nature of neutrinos using Peccei-Quinn symmetry. We discuss two simple scenarios, one based on a type-II Dirac seesaw and the other in a one-loop neutrino mass generation, which solve the strong CP problem and naturally lead to Dirac neutrinos. In the first setup latest neutrino mass limit gives rise to axion which is in the reach of conventional searches. Moreover, we have both

    更新日期:2020-07-01
  • Integrable scalar cosmologies with matter and curvature
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-20
    Davide Fermi; Massimo Gengo; Livio Pizzocchero

    We show that several integrable (i.e., exactly solvable) scalar cosmologies considered by Fré, Sagnotti and Sorin (Nuclear Physics B 877(3) (2013), 1028–1106) can be generalized to include cases where the spatial curvature is not zero and, besides a scalar field, matter or radiation are present with an equation of state p(m)=wρ(m); depending on the specific form of the self-interaction potential for

    更新日期:2020-07-01
  • Density of states approach for lattice gauge theory with a θ-term
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-25
    Christof Gattringer; Oliver Orasch

    We discuss a new strategy for treating the complex action problem of lattice field theories with a θ-term based on density of states (DoS) methods. The key ingredient is to use open boundary conditions where the topological charge is not quantized to integers and the density of states is sufficiently well behaved such that it can be computed precisely with recently developed DoS techniques. After a

    更新日期:2020-06-30
  • Non-perturbative completion of Hopf-algebraic Dyson-Schwinger equations
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-25
    Michael Borinsky; Gerald V. Dunne

    For certain quantum field theories, the Kreimer-Connes Hopf-algebraic approach to renormalization reduces the Dyson-Schwinger equations to a system of non-linear ordinary differential equations for the expansion coefficients of the renormalized Green's function. We apply resurgent asymptotic analysis to find the trans-series solutions which provide the non-perturbative completion of these formal Dyson-Schwinger

    更新日期:2020-06-30
  • Second order Langevin equation and definition of quantum gravity by stochastic quantisation
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-09
    Laurent Baulieu; Siye Wu

    Euclidean quantum gravity might be defined by stochastic quantisation that is governed by a higher order Langevin equation rather than a first order stochastic equation. In a transitory phase where the Lorentz time cannot be defined, the parameter that orders the evolution of quantum gravity phenomena is the stochastic time. This changes the definition of causality in the period of primordial cosmology

    更新日期:2020-06-29
  • Model independent study for the anomalous quartic WWγγ couplings at Future Electron-Proton Colliders
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-29
    V. Ari; E. Gurkanli; A.A. Billur; M. Koksal

    The Large Hadron Electron Collider and the Future Circular Collider-hadron electron with high center-of-mass energy and luminosity allow to better understand the Standard Model and to examine new physics beyond the Standard Model in the electroweak sector. Multi-boson processes permit for a measurement of the gauge boson self-interactions of the Standard Model that can be used to determine the anomalous

    更新日期:2020-06-29
  • On branches of the KS black hole
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-17
    Alex Buchel

    The Klebanov-Strassler black hole is a holographic dual to N=1 supersymmetric SU(N)×SU(N+M) cascading gauge theory plasma with spontaneously broken chiral symmetry. The chiral symmetry breaking sector of the cascading gauge theory contains two dimension-3 operators and a single dimension-7 operator. The black hole solution constructed in [1] represents the end point of the instability triggered by

    更新日期:2020-06-25
  • New hybrid textures for neutrino mass matrices
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-06
    S. Dev; Desh Raj

    We perform a systematic investigation of the texture structures of Majorana neutrino mass matrix Mν having two texture zeros and an equality between two nonzero matrix elements, in the light of recent neutrino oscillation data. Among forty-two possible textures, it is found that only eight textures are compatible with the current experimental data at 3σ C.L. Out of these phenomenologically viable textures

    更新日期:2020-06-18
  • Separation of Variables for a flux tube with an end
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-16
    A.V. Belitsky

    We consider a partial light-cone limit of a correlation function of the stress-tensor multiplet and identify an integrable structure emerging at one loop order of perturbation theory. It corresponds to a noncompact open spin chain with one boundary being recoil-less while the other one fully dynamical. We solve the system by means of techniques of the Baxter operator and Separation of Variables. The

    更新日期:2020-06-18
  • Overcharging problem and thermodynamics in extended phase spaces
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-09
    Deyou Chen; Shan Zeng

    In this paper, the overcharging problem and thermodynamics in the extended phase spaces of the five-dimensional spherically symmetric topological black holes are investigated by absorptions of scalar particles and fermions. The cosmological constant is regarded as a variable related to pressure and its conjugate quantity is a thermodynamic volume. The first law of thermodynamics is recovered. The second

    更新日期:2020-06-18
  • Group manifolds and homogeneous spaces with HKT geometry: The role of automorphisms
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-14
    A.V. Smilga

    We present a new simple proof of the fact that certain group manifolds as well as certain homogeneous spaces G/H of dimension 4n admit a triple of integrable complex structures that satisfy the quaternionic algebra and are covariantly constant with respect to the same torsionful Bismut connection, i.e. exhibit the HKT geometry. The key observation is that different complex structures are interrelated

    更新日期:2020-06-18
  • Contraction diagram analysis in pion-kaon scattering
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-12
    Chaitra Kalmahalli Guruswamy; Ulf-G. Meißner; Chien-Yeah Seng

    We study the contributions from the connected and disconnected contraction diagrams to the pion-kaon scattering amplitude within the framework of SU(4|1) partially-quenched chiral perturbation theory. Combining this with a finite-volume analysis, we demonstrate that a lattice calculation of the easier computable connected correlation functions is able to provide valuable information of the noisier

    更新日期:2020-06-12
  • Multi-graded Galilean conformal algebras
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-10
    Eric Ragoucy; Jørgen Rasmussen; Christopher Raymond

    Galilean conformal algebras can be constructed by contracting a finite number of conformal algebras, and enjoy truncated Z-graded structures. Here, we present a generalisation of the Galilean contraction procedure, giving rise to Galilean conformal algebras with truncated Z⊗σ-gradings, σ∈N. Detailed examples of these multi-graded Galilean algebras are provided, including extensions of the Galilean

    更新日期:2020-06-10
  • Minimal extended seesaw and group symmetry realization of two-zero textures of neutrino mass matrices
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-09
    Priyanka Kumar; Mahadev Patgiri

    We study the phenomenology of two-zero textures of Mν4×4 neutrino mass matrices in the minimal extended seesaw (MES) mechanism. Mν4×4 involves 3×3 Dirac neutrino mass matrix (MD), 3×3 right-handed Majorana neutrino mass matrix MR and 1×3 matrix MS that couples the singlet field ‘S’ with the right-handed neutrinos. We consider the phenomenologically predictive cases (5+3) and (6+2) schemes for zero

    更新日期:2020-06-09
  • Ergosphere and shadow of a rotating regular black hole
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-09
    Sushant G. Ghosh; Muhammed Amir; Sunil D. Maharaj

    The spacetime singularities in classical general relativity predicted by the celebrated singularity theorems are formed at the end of gravitational collapse. Quantum gravity is the expected theory to resolve the singularity problem but we are now far from it. Therefore attention has shifted to models of regular black holes free from the singularities. A spherically symmetric regular toy model was obtained

    更新日期:2020-06-09
  • All-loop Mondrian reduction of 4-particle amplituhedron at positive infinity
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-09
    Junjie Rao

    This article introduces a systematic framework to understand (not to derive yet) the all-loop 4-particle amplituhedron in planar N=4 SYM, utilizing both positivity and the Mondrian diagrammatics. Its key idea is the simplest one so far: we can decouple one or more sets of loop variables (x,y,z,w) from the rest by just setting these variables to either zero or infinity so that their relevant positivity

    更新日期:2020-06-09
  • Comments on η-deformed principal chiral model from 4D Chern-Simons theory
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-08
    Osamu Fukushima; Jun-ichi Sakamoto; Kentaroh Yoshida

    We study η-deformations of principal chiral model (PCM) from the viewpoint of a 4D Chern-Simons (CS) theory. The η-deformed PCM has originally been derived from the 4D CS theory by Delduc, Lacroix, Magro and Vicedo [arXiv:1909.13824]. The derivation is based on a twist function in the rational description. On the other hand, we start with a twist function in the trigonometric description and discuss

    更新日期:2020-06-08
  • AdS5–Schwarzschild deformed black branes and hydrodynamic transport coefficients
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-08
    A.J. Ferreira–Martins; P. Meert; R. da Rocha

    A family of deformed AdS5–Schwarzschild black branes is here derived, employing the membrane paradigm of AdS/CFT. The solution of the Einstein–Hilbert action, with the Gibbons–Hawking term and a counter-term that eliminates eventual divergences, yields a partition function associated to the dual theory which allows the computation of the entropy, pressure and free energy, as state functions, in the

    更新日期:2020-06-08
  • TT¯-deformation and Liouville gravity
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-05
    Suguru Okumura; Kentaroh Yoshida

    We consider a gravitational perturbation of the Jackiw-Teitelboim (JT) gravity with an arbitrary dilaton potential and study the condition under which the quadratic action can be seen as a TT¯-deformation of the matter action. As a special case, the flat-space JT gravity discussed by Dubovsky et al. [arXiv:1706.06604] is included. Another interesting example is a hyperbolic dilaton potential. This

    更新日期:2020-06-05
  • Anomalous mechanisms of the loss of observability in non-Hermitian quantum models
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-04
    Miloslav Znojil; Denis I. Borisov

    Via several toy-model quantum Hamiltonians H(λ) of a non-tridiagonal low-dimensional matrix form the existence of unusual observability horizons is revealed. At the corresponding limiting values of parameter λ=λ(critical) these new types of quantum phase transitions are interpreted as the points of confluence of several decoupled Kato's exceptional points of equal or different orders. Such a phenomenon

    更新日期:2020-06-04
  • Superconnection in the spin factor approach to particle physics
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-06-03
    Michel Dubois-Violette; Ivan Todorov

    The notion of superconnection devised by Quillen in 1985 and used in gauge-Higgs field theory in the 1990's is applied to the spin factors (finite-dimensional euclidean Jordan algebras) recently considered as representing the finite quantum geometry of one generation of fermions in the Standard Model of particle physics.

    更新日期:2020-06-03
  • Oscillator realisations associated to the D-type Yangian: Towards the operatorial Q-system of orthogonal spin chains
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-29
    Rouven Frassek

    We present a family of novel Lax operators corresponding to representations of the RTT-realisation of the Yangian associated with D-type Lie algebras. These Lax operators are of oscillator type, i.e. one space of the operators is infinite-dimensional while the other is in the first fundamental representation of so(2r). We use the isomorphism between the first fundamental representation of D3 and the

    更新日期:2020-05-29
  • BPS submodels of the generalized Skyrme model and how to find them
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-28
    Ardian Nata Atmaja; Bobby Eka Gunara; Ilham Prasetyo

    Using the BPS Lagrangian method we show that all known BPS submodels of the generalized Skyrme model, with a particular ansatz for the fields content, can be divided into three groups based on the (effective) number of derivative-terms in the BPS submodels. We are able to derive rigorously the Bogomolny's equations of those BPS submodels. The resulting Bogomolny's equations, along with possible constraint

    更新日期:2020-05-28
  • Search for vector-like T quark through th channel at eγ collider
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-26
    Liangliang Shang; Wei Wei; Bingfang Yang

    In an extension of the Standard Model with vector-like top partner, we investigate the vector-like top quark partner T via the channel e−γ→bνeT¯(→t¯h) at future linear collider. Due to the larger production rates than unpolarized beams, we calculate the production cross sections in polarized beams at s=2 and 3 TeV. We make a fast detector simulation for signal and background events and take a set of

    更新日期:2020-05-26
  • The two-mass contribution to the three-loop polarized gluonic operator matrix element Agg,Q(3)
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-25
    J. Ablinger; J. Blümlein; A. De Freitas; A. Goedicke; M. Saragnese; C. Schneider; K. Schönwald

    We compute the two-mass contributions to the polarized massive operator matrix element Agg,Q(3) at third order in the strong coupling constant αs in Quantum Chromodynamics analytically. These corrections are important ingredients for the matching relations in the variable flavor number scheme and for the calculation of Wilson coefficients in deep–inelastic scattering in the asymptotic regime Q2≫mc2

    更新日期:2020-05-25
  • TMD soft function from large-momentum effective theory
    Nucl. Phys. B (IF 2.817) Pub Date : 2020-05-25
    Xiangdong Ji; Yizhuang Liu; Yu-Sheng Liu

    We study Euclidean formulations of the transverse-momentum-dependent (TMD) soft function, which is a cross section for soft gluon radiations involving color charges moving in two conjugate lightcone directions in quantum chromodynamics. We show it is related to a special form factor of a pair of color sources traveling with nearly-lightlike velocities, which can be matched to TMD physical observables

    更新日期:2020-05-25
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