First lattice calculation of radiative leptonic decay rates of pseudoscalar mesonsWe present a non-perturbative lattice calculation of the form factors which contribute to the amplitudes for the radiative decays P γ, where P is a pseudoscalar meson…A. Desiderio, R. Frezzotti, M. Garofalo et al.·Jun 9, 2020SaveLearn
Complex Langevin: Boundary terms at polesWe discuss the problem of possible boundary terms at poles of the drift in the complex Langevin method, which spoil correctness of the method. For the simplest, however paradigmatic cases we can find…Erhard Seiler·Jun 8, 2020SaveLearn
A density of states approach to the hexagonal Hubbard model at finite densityWe apply the Linear Logarithmic Relaxation (LLR) method, which generalizes the Wang-Landau algorithm to quantum systems with continuous degrees of freedom, to the fermionic Hubbard model with…Michael Körner, Kurt Langfeld, Dominik Smith et al.·Jun 8, 2020SaveLearn
Sign Problems in Quantum Field Theory: Classical and Quantum ApproachesMonte Carlo calculations in the framework of lattice field theory provide non-perturbative access to the equilibrium physics of quantum fields. When applied to certain fermionic systems, or to the…Scott Lawrence·Jun 5, 2020SaveLearn
't Hooft surface in lattice gauge theoryWe discuss the lattice formulation of the 't Hooft surface, that is, the two-dimensional surface operator of a dual variable. The 't Hooft surface describes the world sheets of topological vortices.…Takuya Shimazaki, Arata Yamamoto·Jun 4, 2020SaveLearn
S-wave kaon-nucleon potentials with all-to-all propagators in the HAL QCD methodIn this paper, employing an all-to-all quark propagator technique, we investigate the kaon-nucleon interactions in lattice QCD. We calculate the S-wave kaon-nucleon potentials at the leading order in…Kotaro Murakami, Yutaro Akahoshi, Sinya Aoki·Jun 2, 2020SaveLearn
d (2380) dibaryon from lattice QCDThe dibaryon resonance d (2380) with (JP, I)=(3+, 0) is studied theoretically on the basis of the 3-flavor lattice QCD simulation with heavy pion masses (mπ =679, 841…Shinya Gongyo, Kenji Sasaki, Takaya Miyamoto et al.·Jun 1, 2020SaveLearn
New perspectives on the emergence of (3+1)D expanding space-time in the Lorentzian type IIB matrix modelThe type IIB matrix model is a promising candidate for a nonperturbative formulation of superstring theory. In the Lorentzian version, in particular, the emergence of (3+1)D expanding space-time was…Jun Nishimura·Jun 1, 2020SaveLearn
Complex Langevin simulations and the QCD phase diagram: Recent developmentsIn this review we present the current state-of-the-art on complex Langevin simulations and their implications for the QCD phase diagram. After a short summary of the complex Langevin method, we…Felipe Attanasio, Benjamin Jäger, Felix P. G. Ziegler·May 31, 2020SaveLearn
Lattice-QCD Calculations of TMD Soft Function Through Large-Momentum Effective TheoryThe transverse-momentum-dependent (TMD) soft function is a key ingredient in QCD factorization of Drell-Yan and other processes with relatively small transverse momentum. We present a lattice QCD…Qi-An Zhang, Jun Hua, Yikai Huo et al.·May 29, 2020SaveLearn
Gluon Field Digitization via Group Space Decimation for Quantum ComputersEfficient digitization is required for quantum simulations of gauge theories. Schemes based on discrete subgroups use fewer qubits at the cost of systematic errors. We systematize this approach by…Yao Ji, Henry Lamm, Shuchen Zhu·May 28, 2020SaveLearn
Pion and Kaon Distribution Amplitudes in the Continuum LimitWe present a lattice-QCD calculation of the pion, kaon and ηs distribution amplitudes using large-momentum effective theory (LaMET). Our calculation is carried out using three ensembles with…Rui Zhang, Carson Honkala, Huey-Wen Lin et al.·May 28, 2020SaveLearn
Moments of nucleon isovector structure functions in 2+1+1-flavor QCDWe present results on the isovector momentum fraction, x u-d, helicity moment, x u- d, and the transversity moment, $ x δ…Santanu Mondal, Rajan Gupta, Sungwoo Park et al.·May 28, 2020SaveLearn
Inclusive semi-leptonic decays from lattice QCDWe develop a method to compute inclusive semi-leptonic decay rate of hadrons fully non-perturbatively using lattice QCD simulations. The sum over all possible final states is achieved by a…Paolo Gambino, Shoji Hashimoto·May 28, 2020SaveLearn
Light- and strange-quark mass dependence of the (770) meson revisitedRecent lattice data on ππ-scattering phase shifts in the vector-isovector channel, pseudoscalar meson masses and decay constants for strange-quark masses smaller or equal to the physical value…R. Molina, J. Ruiz de Elvira·May 27, 2020SaveLearn
Holography on tessellations of hyperbolic spaceWe compute boundary correlation functions for scalar fields on tessellations of two- and three-dimensional hyperbolic geometries. We present evidence that the continuum relation between the scalar…Muhammad Asaduzzaman, Simon Catterall, Jay Hubisz et al.·May 26, 2020SaveLearn
Dynamical Compactification of Extra Dimensions in the Euclidean IKKT Matrix Model via Spontaneous Symmetry BreakingThe IKKT matrix model has been conjectured to provide a promising nonperturbative formulation of superstring theory. In this model, spacetime emerges dynamically from the microscopic matrix degrees…Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito et al.·May 26, 2020SaveLearn
Isovector parton distribution functions of the proton on a superfine latticeWe study isovector unpolarized and helicity parton distribution functions (PDF) of the proton within the framework of Large Momentum Effective Theory. We use a gauge ensemble, generated by the MILC…Zhouyou Fan, Xiang Gao, Ruizi Li et al.·May 25, 2020SaveLearn
Dual formulations of Polyakov loop lattice modelsDual representations are constructed for non-abelian lattice spin models with U(N) and SU(N) symmetry groups, for all N and in any dimension. These models are usually related to the effective models…O. Borisenko, V. Chelnokov, S. Voloshyn·May 22, 2020SaveLearn
Strong Coupling Lattice QCD in the Continuous Time LimitWe present results for lattice QCD with staggered fermions in the limit of infinite gauge coupling, obtained from a worm-type Monte Carlo algorithm on a discrete spatial lattice but with continuous…Marc Klegrewe, Wolfgang Unger·May 21, 2020SaveLearn
Casimir effect for lattice fermionsWe propose a definition of the Casimir energy for free lattice fermions. From this definition, we study the Casimir effects for the massless or massive naive fermion, Wilson fermion, and (M\"obius)…Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki·May 21, 2020SaveLearn
Chiral symmetry and taste symmetry from the eigenvalue spectrum of staggered Dirac operatorsWe investigate general properties of the eigenvalue spectrum for improved staggered quarks. We introduce a new chirality operator [γ5 1] and a new shift operator [1 5],…Hwancheol Jeong, Chulwoo Jung, Seungyeob Jwa et al.·May 21, 2020SaveLearn
Pion magnetic polarisability using the background field methodThe magnetic polarisability is a fundamental property of hadrons, which provides insight into their structure in the low-energy regime. The pion magnetic polarisability is calculated using lattice…Ryan Bignell, Waseem Kamleh, Derek Leinweber·May 21, 2020SaveLearn
Varieties and properties of central-branch Wilson fermionsWe focus on the four-dimensional central-branch Wilson fermion, which makes good use of six species at the central branch of the Wilson Dirac spectrum and possesses the extra U(1) V…Tatsuhiro Misumi, Jun Yumoto·May 18, 2020SaveLearn
More about the Grassmann tensor renormalization groupWe derive a general formula of the tensor network representation for d-dimensional lattice fermions with ultra-local interactions, including Wilson fermions, staggered fermions, and domain-wall…Shinichiro Akiyama, Daisuke Kadoh·May 15, 2020SaveLearn