Susceptibilities and screening masses in two flavor QCD

Abstract

We studied QCD with two flavors of dynamical staggered quarks at finite temperature, with a bare sea quark mass of about 17 MeV. We report investigations of baryon, isospin, charge and strangeness susceptibilities, as well as screening masses obtained from correlators of local and one-link separated meson operators. These were studied as functions of valence quark mass at several temperatures. Our results for susceptibilities deviate significantly from ideal gas values, and even more from the weak coupling series. We also report the first measurement of off-diagonal quark number susceptibilities below the transition temperature, Tc, where they are the main contribution to charge fluctuations. We present evidence for a close connection between the susceptibilities and the screening masses.

15 pp, 4 figs

References in corpus (3)

• Quark Mass and Flavour Dependence of the QCD Phase Transition
• Equation of state in finite-temperature QCD with two flavors of improved Wilson quarks
• Quark number susceptibilities, strangeness and dynamical confinement

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