QCD thermodynamics with Wilson quarks at large kappa

TL;DR

This study investigates the high temperature transition in QCD with Wilson quarks at large kappa, revealing a transition that resembles a bulk transition rather than a thermal quark-gluon plasma transition, with results consistent with previous Kogut-Susskind quark studies.

Contribution

The paper extends the analysis of QCD thermodynamics with Wilson quarks to larger kappa values and provides spectrum calculations to determine physical parameters.

Findings

Large discontinuity in plaquette and psi-bar-psi at transition

Polyakov loop shows little change at transition

Estimated transition temperature around 150 MeV

Abstract

We have extended our study of the high temperature transition with two flavors of Wilson quarks on 12^3 x 6 lattices to kappa=0.19. We have also performed spectrum calculations on 12^3 x 24 lattices at kappa=0.19 to find the physical lattice spacing and quark mass. At this value of kappa the transition is remarkable in that the plaquette and psi-bar-psi show a large discontinuity while the Polyakov loop changes very little. This and several other features of the transition are more suggestive of a bulk transition than a transition to a quark-gluon plasma. However, if the temperature is estimated using the rho mass as a standard, the result is about 150 MeV, in agreement with the value found for the thermal transition with Kogut-Susskind quarks. uuencoded compressed Postscript file