Taste symmetry breaking at finite temperature

Abstract

The breaking of the taste symmetry is studied in the temperature range between 140 MeV to 550 MeV. In order to investigate this violation we have calculated the screening masses of the various taste states fitting the exponential decay of the spatial correlators. The computation has been performed using dynamical Nf = 2+1 gauge field configurations generated with the p4 staggered action along the Line of Constant Physics (LCP) defined by a pion mass $m_{\pi }$ of approximately 220 MeV and the kaon mass $m_K$ equals 500 MeV. For temperatures below the transition an agreement with the predictions of the 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. In addition to the analysis done for the pion multiplet we have performed an analogous computation for the light-strange and strange mesons and also looked at the scalar, vector and axial vector channels to understand how the multiplets split at finite temperature. Finally the temperature dependence of the pion decay constant $f_{\pi }$ is investigated to get further information about the chiral symmetry restoration.

arXiv comment14 pages, 27 figures, 4 tables

References in corpus (30)

• The QCD Equation of State with almost Physical Quark Masses
• Equation of state and QCD transition at finite temperature
• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• Full nonperturbative QCD simulations with 2+1 flavors of improved staggered quarks
• The QCD spectrum with three quark flavors
• The Pressure in 2, 2+1 and 3 Flavour QCD
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• Variants of fattening and flavor symmetry restoration
• The equation of state in lattice QCD: with physical quark masses towards the continuum limit
• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• 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
• Meson screening masses from lattice QCD with two light and the strange quark
• Exact 2+1 flavour RHMC simulations
• A New Exact Method for Dynamical Fermion Computations with Non-Local Actions
• Scaling tests with dynamical overlap and rooted staggered fermions
• Chiral Logs in the Presence of Staggered Flavor Symmetry Breaking
• Improved Staggered Fermion Actions for QCD Thermodynamics
• Chiral anomalies and rooted staggered fermions
• Scalar Meson Spectroscopy with Lattice Staggered Fermions
• Locality of the fourth root of the Staggered-fermion determinant: renormalization-group approach
• Comment on "Chiral anomalies and rooted staggered fermions"
• On the fourth root prescription for dynamical staggered fermions
• Locality with staggered fermions
• Order of the Chiral and Continuum Limits in Staggered Chiral Perturbation Theory
• The Spatial String Tension and Dimensional Reduction in QCD
• The author replies
• Representations of Fermionic Correlators at Finite Temperatures
• The fourth root of the Kogut-Susskind determinant via infinite component fields

Cited by in corpus (5)

• Meson Screening Masses in (2+1)-Flavor QCD
• Thermodynamic Properties of Strongly Interacting Matter in a Finite Volume using the Polyakov-Nambu-Jona-Lasinio model
• In-medium modifications of open and hidden strange-charm mesons from spatial correlation functions
• Thermal properties of $\pi$ and $\rho$ meson
• Hadronic Screening in Improved Taste