Spectral quantities in thermal QCD: a progress report from the FASTSUM collaborationIn order to study spectral quantities in thermal QCD, the FASTSUM collaboration employs anisotropic lattice simulations with Nf=2+1 flavours of Wilson fermions. Here we discuss our Generation 2 and…Gert Aarts, Chris Allton, Jonas Glesaaen et al.·Dec 20, 2019SaveLearn
The Hubbard model in the canonical formulationWe describe non-relativistic fermions on the lattice (Hubbard model) in the canonical formulation using transfer matrices in fixed fermion number sectors such that the partition function becomes…Sebastian Burri, Urs Wenger·Dec 19, 2019SaveLearn
Towards a semi-classical description of QCD vacuum around TcWe study the vacuum topology of 2+1 flavor QCD above the chiral crossover transition, at T 1.2~Tc, on lattices of size 323× 8. Since overlap fermions have exact chiral symmetry…Rasmus N. Larsen, Sayantan Sharma, Edward Shuryak·Dec 19, 2019SaveLearn
ΛΛ and NΞ interactions from Lattice QCD near the physical pointThe S-wave ΛΛ and N Ξ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point (mπ 146MeV and mK 525MeV).…Kenji Sasaki, Sinya Aoki, Takumi Doi et al.·Dec 18, 2019SaveLearn
Visualisation of Centre Vortex StructureThe centre vortex structure of the SU(3) gauge field vacuum is explored through the use of novel visualisation techniques. The lattice is partitioned into 3D time slices, and vortices are…James C. Biddle, Waseem Kamleh, Derek B. Leinweber·Dec 18, 2019SaveLearn
Gluon propagators in QC2D at high baryon densityWe study the transverse and longitudinal gluon propagators in the Landau-gauge lattice QCD with gauge group SU(2) at nonzero quark chemical potential and zero temperature. We show that both…Vitaly Bornyakov, Andrey Kotov, Alexander Nikolaev et al.·Dec 18, 2019SaveLearn
Asymptotic behavior of cutoff effects in Yang-Mills theory and in Wilson's lattice QCDDiscretization effects of lattice QCD are described by Symanzik's effective theory when the lattice spacing, a, is small. Asymptotic freedom predicts that the leading asymptotic behavior is…Nikolai Husung, Peter Marquard, Rainer Sommer·Dec 18, 2019SaveLearn
Automated label flows for excited states of correlation functions in lattice gauge theoryExtracting excited states from lattice gauge theory correlation functions can be achieved through chi-squared minimization fits or algebraic approaches such as the variational method and Prony's…Kimmy K. Cushman, George T. Fleming·Dec 17, 2019SaveLearn
Lattice QCD Determination of gAThe nucleon axial coupling, gA, is a fundamental property of protons and neutrons, dictating the strength with which the weak axial current of the Standard Model couples to nucleons, and hence,…André Walker-Loud, Evan Berkowitz, David A. Brantley et al.·Dec 17, 2019SaveLearn
Phase structure and real-time dynamics of the massive Thirring model in 1+1 dimensions using the tensor-network methodWe present concluding results from our study for zero-temperature phase structure of the massive Thirring model in 1+1 dimensions with staggered regularisation. Employing the method of matrix product…Mari Carmen Bañuls, Krzysztof Cichy, Hao-Ti Hung et al.·Dec 16, 2019SaveLearn
Case studies of near-conformal β-functionsWe present updated results for the non-perturbative β-function of SU(3) gauge theories with Nf = 12 or 10 massless flavors in the fundamental rep or Nf = 2 in the sextet rep, measured with…Zoltan Fodor, Kieran Holland, Julius Kuti et al.·Dec 16, 2019SaveLearn
An exploratory study of heavy-light semileptonic form factors using distillationWe present our exploratory study with the aim of simulating heavy-light semileptonic form factors as part of the RBC-UKQCD charm (to bottom) physics programme. We are using a distillation-based setup…Peter Boyle, Felix Erben, Michael Marshall et al.·Dec 16, 2019SaveLearn
Dirac spectrum and the BEC-BCS crossover in QCD at nonzero isospin asymmetryFor large isospin asymmetries, perturbation theory predicts the QCD ground state to be a superfluid phase of u and d Cooper pairs. This phase, which is denoted as the BCS phase, is expected…B. B. Brandt, F. Cuteri, G. Endrődi et al.·Dec 16, 2019SaveLearn
Sp(4) gauge theories on the lattice: Quenched fundamental and antisymmetric fermionsWe perform lattice studies of meson mass spectra and decay constants of the Sp(4) gauge theory in the quenched approximation. We consider two species of (Dirac) fermions as matter field content,…Ed Bennett, Deog Ki Hong, Jong-Wan Lee et al.·Dec 13, 2019SaveLearn
Loop, String, and Hadron Dynamics in SU(2) Hamiltonian Lattice Gauge TheoriesThe question of how to efficiently formulate Hamiltonian gauge theories is experiencing renewed interest due to advances in building quantum simulation platforms. We introduce a reformulation of an…Indrakshi Raychowdhury, Jesse R. Stryker·Dec 12, 2019SaveLearn
UV divergence of the quasi-PDF operator under the lattice regularizationEven since the "quasi" parton distribution function (PDF) was proposed under the large-momentum effective theory (LaMET) framework, its renormalization under the lattice regularization has…Yikai Huo, Peng Sun·Dec 12, 2019SaveLearn
Non-perturbative renormalization by decouplingWe propose a new strategy for the determination of the QCD coupling. It relies on a coupling computed in QCD with N f ≥ 3 degenerate heavy quarks at a low energy scale μ dec,…Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli et al.·Dec 12, 2019SaveLearn
The Dν semileptonic decay at nonzero recoil and its implications for \ |Vcb\ | and R(D)We present nearly final results from our analysis of the form factors for B Dν decay at nonzero recoil. Our analysis includes 15 MILC asqtad ensembles with Nf=2+1 flavors of sea…Alejandro Vaquero Avilés-Casco, Carleton DeTar, Aida X. El-Khadra et al.·Dec 12, 2019SaveLearn
Nπ-states and the projection method for the nucleon axial and pseudoscalar form factorsThe RQCD collaboration proposed a projection method to remove the excited state contamination in lattice OCD calculations of nuclear form factors. The effectiveness of this method in removing the…Oliver Bar·Dec 12, 2019SaveLearn
Renormalization of a Contact Interaction on a LatticeContact interactions can be used to describe a system of particles at unitarity, contribute to the leading part of nuclear interactions and are numerically non-trivial because they require a proper…Christopher Körber, Evan Berkowitz, Thomas Luu·Dec 10, 2019SaveLearn
New canonical and grand canonical DoS techniques for finite density lattice QCDWe discuss two new DoS approaches for finite density lattice QCD. The paper extends a recent presentation of the new techniques based on Wilson fermions, while here we now discuss and test the case…Christof Gattringer, Michael Mandl, Pascal Törek·Dec 10, 2019SaveLearn
wickop: Lattice Cubic Rotation Operator GeneratorThis document outlines the usage of a series of python 2.7 scripts designed to easily and efficiently create compound operators. This is accomplished by computing tensor products of smaller building…Aaron S. Meyer·Dec 10, 2019SaveLearn
Constraining the QCD phase diagram at finite temperature and densityNeither the chiral limit nor finite baryon density can be simulated directly in lattice QCD, which severely limits our understanding of the QCD phase diagram. In this review I collect results for the…Owe Philipsen·Dec 10, 2019SaveLearn
Effective thermal potential between static Q and Q in SU(3) gauge theoryA non-perturbative calculation of the effective thermal potential between heavy Q and Q from lattice QCD is difficult, and usually involves a Bayesian analysis. Here we present a simple…Dibyendu Bala, Saumen Datta·Dec 10, 2019SaveLearn
Stress distribution in quark--anti-quark and single quark systems at nonzero temperatureWe explore the distribution of the energy momentum tensor (EMT) around quark--anti-quark and single quark at nonzero temperature in SU(3) Yang-Mills gauge theory by extending our previous study on…Ryosuke Yanagihara, Takumi Iritani, Masakiyo Kitazawa et al.·Dec 10, 2019SaveLearn