Screening masses of mesons in 2+1 flavour QCD

TL;DR

This study computes meson screening masses in 2+1 flavor QCD with improved staggered fermions, analyzing their dependence on lattice parameters and comparing with non-interacting theories to understand discretization effects.

Contribution

It provides detailed results for meson screening masses in 2+1 flavor QCD using improved staggered fermions, including cut-off and volume dependence analysis.

Findings

Screening masses for various mesons are computed along the line of constant physics.

Discretization and volume effects are systematically studied using non-interacting theory comparisons.

Results help understand the behavior of mesons in finite-temperature QCD simulations.

Abstract

We present results for screening masses of light and strange mesons in 2+1 flavour QCD using improved (p4fat3) staggered fermions on 6x24^3 lattices. We have studied the screening masses of scalar, pseudo-scalar, vector and axial-vector mesons along the line of constant physics, determined by a pion mass ~220 MeV and a kaon mass ~500 MeV. In order to investigate the cut-off and volume dependencies we have also performed studies of the meson screening correlators in the non-interacting theory using the p4 and the standard staggered discretizations.