The phase structure of lattice QCD with two flavours of Wilson quarks and renormalization group improved gluons

Abstract

The effect of changing the lattice action for the gluon field on the recently observed [1] first order phase transition near zero quark mass is investigated by replacing the Wilson plaquette action by the DBW2 action. The lattice action for quarks is unchanged: it is in both cases the original Wilson action. It turns out that Wilson fermions with the DBW2 gauge action have a phase structure where the minimal pion mass and the jump of the average plaquette are decreased, when compared to Wilson fermions with Wilson plaquette action at similar values of the lattice spacing. Taking the DBW2 gauge action is advantageous also from the point of view of the computational costs of numerical simulations.

34 pages, 3 tables, 14 figures; revised version to appear in EPJC

References in corpus (8)

• The phase diagram of twisted mass lattice QCD
• Pion mass splitting and phase structure in Twisted Mass QCD
• On the phase structure of twisted mass lattice QCD
• Twisted mass quarks and the phase structure of lattice QCD
• A numerical reinvestigation of the Aoki phase with N_f=2 Wilson fermions at zero temperature
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• Quark mass dependence of pseudoscalar masses and decay constants on a lattice
• Cutoff-effects in the spectrum of dynamical Wilson fermions

Cited by in corpus (54)

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• Light Hadron Masses from Lattice QCD
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• First Physics Results at the Physical Pion Mass from $N_f=2$ Wilson Twisted Mass Fermions at Maximal Twist
• Reducing cutoff effects in maximally twisted lattice QCD close to the chiral limit
• Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
• Meson masses and decay constants from unquenched lattice QCD
• A lattice study of the masses of singlet 0++ mesons
• Volume and Quark Mass Dependence of the Chiral Phase Transition
• Scaling study of dynamical smeared-link clover fermions
• Numerical simulation of QCD with u, d, s and c quarks in the twisted-mass Wilson formulation
• Quenched Scaling of Wilson twisted mass fermions
• Chiral condensate from the twisted mass Dirac operator spectrum
• Flavour Breaking Effects of Wilson twisted mass fermions
• Lattice Spacing Dependence of the First Order Phase Transition for Dynamical Twisted Mass Fermions
• Strange quarks in quenched twisted mass lattice QCD
• Observations on discretization errors in twisted-mass lattice QCD
• Discretization errors in the spectrum of the Hermitian Wilson-Dirac operator
• O(a^2) cutoff effects in lattice Wilson fermion simulations
• Topological susceptibility from twisted mass fermions using spectral projectors and the gradient flow
• Importance of meson-meson and of diquark-antidiquark creation operators for a $\bar{b}\bar{b}ud$ tetraquark
• Updating algorithms with multi-step stochastic correction
• Numerical simulations with two flavours of twisted-mass Wilson quarks and DBW2 gauge action
• Phase Diagram of Dynamical Twisted Mass Wilson Fermions at Finite Isospin Chemical Potential
• Scaling test of fermion actions in the Schwinger model
• Determination of Low-Energy Constants of Wilson Chiral Perturbation Theory
• Parton Distribution Functions with Twisted Mass Fermions
• Spectral Properties of the Wilson Dirac Operator and random matrix theory
• Bulk first-order phase transition in three-flavor lattice QCD with $O(a)$-improved Wilson fermion action at zero temperature
• Constraint on the Low Energy Constants of Wilson Chiral Perturbation Theory
• Phase structure of thermal lattice QCD with N_f=2 twisted mass Wilson fermions
• The Realization of the Sharpe-Singleton Scenario
• Applications of Chiral Perturbation theory to lattice QCD
• Topological susceptibility from the twisted mass Dirac operator spectrum
• Spectral density of the Hermitean Wilson Dirac operator: a NLO computation in chiral perturbation theory
• QCD with two flavors of Wilson fermions: The QCD vacuum, the Aoki vacuum and other vacua
• Quark mass anomalous dimension and ${\Lambda }_{\overline{\text{MS}}}$ from the twisted mass Dirac operator spectrum
• Twisted mass lattice QCD with non-degenerate quark masses
• Non-perturbative running of renormalization constants from correlators in coordinate space using step scaling
• On the phase structure of lattice QCD with twisted-mass Wilson fermions at non-zero temperature
• Nf=2 Lattice QCD and Chiral Perturbation Theory
• Two--dimensional lattice Gross--Neveu model with Wilson twisted mass fermions
• Towards Four-Flavour Dynamical Simulations
• Dynamical simulations with HYP-link Wilson fermions
• Lattice QCD at maximal twist
• The Spectrum of tmLQCD with Quark and Link Smearing
• Exploring the Aoki regime
• The finite-temperature phase structure of lattice QCD with twisted-mass Wilson fermions
• The hadron spectrum from twisted mass QCD with a strange quark