Ratio of flavour non-singlet and singlet scalar density renormalisation parameters in Nf=3 QCD with Wilson quarksWe determine non-perturbatively the normalisation factor rm Z S/Z S0, where Z S and Z S0 are the renormalisation parameters of the flavour…Jochen Heitger, Fabian Joswig, Pia L. J. Petrak et al.·Jan 26, 2021SaveLearn
Decay amplitudes to three hadrons from finite-volume matrix elementsWe derive relations between finite-volume matrix elements and infinite-volume decay amplitudes, for processes with three spinless, degenerate and either identical or non-identical particles in the…Maxwell T. Hansen, Fernando Romero-López, Stephen R. Sharpe·Jan 25, 2021SaveLearn
Introduction to Normalizing Flows for Lattice Field TheoryThis notebook tutorial demonstrates a method for sampling Boltzmann distributions of lattice field theories using a class of machine learning models known as normalizing flows. The ideas and…Michael S. Albergo, Denis Boyda, Daniel C. Hackett et al.·Jan 20, 2021SaveLearn
Bottomonium precision tests from full lattice QCD: hyperfine splitting, leptonic width and b quark contribution to e+e- → hadronsWe calculate the mass difference between the and ηb and the leptonic width from lattice QCD using the Highly Improved Staggered Quark formalism for the b quark and…D. Hatton, C. T. H. Davies, J. Koponen et al.·Jan 20, 2021SaveLearn
Contribution of the QCD -term to nucleon electric dipole momentWe present a calculation of the contribution of the -term to the neutron and proton electric dipole moments using seven 2+1+1-flavor HISQ ensembles. We also estimate the topological…Tanmoy Bhattacharya, Vincenzo Cirigliano, Rajan Gupta et al.·Jan 18, 2021SaveLearn
Phase transition of four-dimensional lattice φ4 theory with tensor renormalization groupWe investigate the phase transition of the four-dimensional single-component φ4 theory on the lattice using the tensor renormalization group method. We have examined the hopping parameter…Shinichiro Akiyama, Yoshinobu Kuramashi, Yusuke Yoshimura·Jan 18, 2021SaveLearn
Axial UA(1) Anomaly: a New Mechanism to Generate Massless BosonsPrior to the establishment of QCD as the correct theory describing hadronic physics, it was realized that the essential ingredients of the hadronic world at low energies are chiral symmetry and its…Vicente Azcoiti·Jan 16, 2021SaveLearn
Three-body interactions from the finite-volume QCD spectrumWe perform a fit of the finite-volume QCD spectrum of three pions at maximal isospin to constrain the three-body force. We use the unitarity-based relativistic three-particle quantization condition,…Ruairí Brett, Chris Culver, Maxim Mai et al.·Jan 15, 2021SaveLearn
Gluon correlation functions from lattice quantum chromodynamicsWe study the gluon sector in pure Yang-Mills theories via the computation of two, three and four point Landau gauge gluon correlation functions via LQCD using the Wilson action for Monte-Carlo…Guilherme Telo R. Catumba·Jan 15, 2021SaveLearn
Normalizing Flows and the Real-Time Sign ProblemNormalizing flows have recently been applied to the problem of accelerating Markov chains in lattice field theory. We propose a generalization of normalizing flows that allows them to applied to…Scott Lawrence, Yukari Yamauchi·Jan 14, 2021SaveLearn
Efficient integration of gradient flow in lattice gauge theory and properties of low-storage commutator-free Lie group methodsThe smoothing procedure known as the gradient flow that suppresses ultraviolet fluctuations of gauge fields plays an important role in lattice gauge theory calculations. In particular, this procedure…Alexei Bazavov, Thomas Chuna·Jan 13, 2021SaveLearn
H(4) tensor representations for the lattice Landau gauge gluon propagator and the estimation of lattice artefactsThe use of lattice tensor representations is explored to investigate the lattice Landau gauge gluon propagator for the pure SU(3) Yang-Mills gauge theory in 4D. The analysis of several tensor bases…Guilherme T. R. Catumba, Orlando Oliveira, Paulo J. Silva·Jan 13, 2021SaveLearn
A Demonstration of Hadron Mass Origin from QCD Trace AnomalyQuantum chromodynamics (QCD) claims that the major source of the nucleon invariant mass is not the Higgs mechanism but the trace anomaly in QCD energy momentum tensor. Although experimental and…Fangcheng He, Peng Sun, Yi-Bo Yang·Jan 13, 2021SaveLearn
Lattice determinations of the strong couplingLattice QCD has reached a mature status. State of the art lattice computations include u,d,s (and even the c) sea quark effects, together with an estimate of electromagnetic and isospin breaking…Luigi Del Debbio, Alberto Ramos·Jan 12, 2021SaveLearn
A novel computational paradigm for a precise determination of the hadronic contribution to (gμ-2) from lattice QCDThe hadronic contribution to the muon anomalous magnetic moment aμ=(gμ-2)/2 has to be determined at the per-mille level for the Standard Model prediction to match the expected final…Leonardo Giusti, Mattia Dalla Brida, Tim Harris et al.·Jan 12, 2021SaveLearn
Decomposition of the SU(2) gauge field in the Maximal Abelian gaugeWe study decomposition of SU(2) gauge field into monopole and monopoleless components. After fixing the Maximal Abelian gauge in SU(2) lattice gauge theory we decompose the nonabelian gauge field…V. G. Bornyakov, I. Kudrov, R. N. Rogalyov·Jan 11, 2021SaveLearn
Simulating Yang-Mills theories with a complex couplingWe propose a novel simulation strategy for Yang-Mills theories with a complex coupling, based on the Lefschetz thimble decomposition. We envisage, that the approach developed in the present work, can…Jan M. Pawlowski, Manuel Scherzer, Christian Schmidt et al.·Jan 11, 2021SaveLearn
The A2 Asymmetry and Gluon Propagators in Lattice SU(3) Gluodynamics at T TcWe study numerically the chromoelectric-chromomagnetic asymmetry of the dimension two A2 gluon condensate as well as the infrared behavior of the gluon propagators at T Tc in the…V. G. Bornyakov, V. A. Goy, V. K. Mitrjushkin et al.·Jan 10, 2021SaveLearn
Topological susceptibility of pure gauge theory using Density of StatesThe topological susceptibility of the SU(3) pure gauge theory is calculated in the deconfined phase at temperatures up to 10Tc. At such large temperatures the susceptibility is suppressed,…Szablocs Borsanyi, Dénes Sexty·Jan 9, 2021SaveLearn
Recent progress on cluster and meron algorithms for strongly correlated systemsAb-initio studies of strongly interacting bosonic and fermionic systems is greatly facilitated by efficient Monte Carlo algorithms. This article emphasizes this requirement, and outlines the ideas…Debasish Banerjee·Jan 8, 2021SaveLearn
Determination of the charm quark mass in lattice QCD with 2+1 flavours on fine latticesWe present a determination of the charm quark mass in lattice QCD with three active quark flavours. The calculation is based on PCAC masses extracted from Nf=2+1 flavour gauge field…Jochen Heitger, Fabian Joswig, Simon Kuberski·Jan 7, 2021SaveLearn
Net-baryon number fluctuationsThe appearance of large, none-Gaussian cumulants of the baryon number distribution is commonly discussed as a signal for the QCD critical point. We review the status of the Taylor expansion of…C. Schmidt, J. Goswami, G. Nicotra et al.·Jan 6, 2021SaveLearn
Quark distribution inside a pion in many-flavor (2 + 1)-dimensional QCD using lattice computations: UV listens to IRWe study the changes in the short-distance quark structure of the Nambu-Goldstone boson when the long-distance symmetry-breaking scales are depleted controllably. We achieve this by studying the…Nikhil Karthik·Jan 6, 2021SaveLearn
Gluons in Two-Color QCD at High Baryon DensityLandau gauge longitudinal and transverse gluon propagators are studied in lattice QCD with gauge group SU(2) at varying temperature and quark density. In particular, it is found that the…V. G. Bornyakov, R. N. Rogalyov·Jan 5, 2021SaveLearn
Ideal topological gas in the high temperature phase of SU(3) gauge theoryWe show that the nature of the topological fluctuations in SU(3) gauge theory changes drastically at the finite temperature phase transition. Starting from temperatures right above the phase…Reka A. Vig, Tamas G. Kovacs·Jan 5, 2021SaveLearn