Flavor symmetry breaking and scaling for improved staggered actions in quenched QCD

Abstract

We present a study of the flavor symmetry breaking in the pion spectrum for various improved staggered fermion actions. To study the effects of link fattening and tadpole improvement, we use three different variants of the p4 action - p4fat3, p4fat7, and p4fat7tad. These are compared to Asqtad and also to naive staggered. To study the pattern of symmetry breaking, we measure all 15 meson masses in the 4-flavor staggered theory. The measurements are done on a quenched gauge background, generated using a one-loop improved Symanzik action with $\beta =10/g^2=7.40,7.75,$ and 8.00, corresponding to lattice spacings of approximately a = .31 fm., .21 fm., and .14 fm. We also study how the lattice scale set by the $\rho$ mass on each of these ensembles compares to one set by the static quark potential.

arXiv comment18 pages, 6 figures

References in corpus (17)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• The QCD transition temperature: results with physical masses in the continuum limit
• Flavor Symmetry and the Static Potential with Hypercubic Blocking
• Quark Mass and Flavour Dependence of the QCD Phase Transition
• The Pressure in 2, 2+1 and 3 Flavour QCD
• The transition temperature in QCD
• Light hadrons with improved staggered quarks: approaching the continuum limit
• Variants of fattening and flavor symmetry restoration
• The equation of state in lattice QCD: with physical quark masses towards the continuum limit
• Flavor-Symmetry Restoration and Symanzik Improvement for Staggered Quarks
• QCD Thermodynamics with Three Flavors of Improved Staggered Quarks
• Partial Flavor Symmetry Restoration for Chiral Staggered Fermions
• Scaling tests of the improved Kogut-Susskind quark action
• Improving the Chiral Properties of Lattice Fermions
• Improved staggered quark actions with reduced flavour symmetry violations for lattice QCD
• Improved Staggered Fermion Actions for QCD Thermodynamics
• Study of the finite temperature transition in 3-flavor QCD using the R and RHMC algorithms

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