Taste symmetry violation at finite temperature

Abstract

Symmetries play a distinctive role at the high temperature phase transition in QCD. Therefore the spectrum of screening masses has been investigated with emphasis on taste breaking. Although taste violation is an UV effect the relevant operators could be temperature dependent. We have studied the meson screening masses in the temperature range between 140 MeV to 550 MeV. The computation has been performed using dynamical N_f = 2+1 gauge field configurations generated with the p4 staggered action. For temperatures below the transition an agreement with the prediction of staggered chiral perturbation theory has been found and no temperature effect can be observed on the taste violation. Above the transition the taste splitting still shows an O(a^2) behavior but with a temperature dependent slope.

arXiv comment7 pages, Proceedings of 30th International Symposium on Lattice Field Theory, June 24-29, 2012, Cairns, Australia

References in corpus (8)

• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• The equation of state in lattice QCD: with physical quark masses towards the continuum limit
• Pion and Kaon masses in Staggered Chiral Perturbation Theory
• Partial Flavor Symmetry Restoration for Chiral Staggered Fermions
• Scaling studies of QCD with the dynamical HISQ action
• Improved Staggered Fermion Actions for QCD Thermodynamics
• Scalar Meson Spectroscopy with Lattice Staggered Fermions