Susceptibilities and screening masses in two flavor QCD

Details Susceptibilities and screening masses in two flavor QCD Susceptibilities and screening masses in two flavor QCD

2001-10-10

arxiv.org/abs/hep-lat/0110032v1

Phys.Rev. D65 (2002) 054506

Physics

High Energy Physics

High Energy Physics - Lattice

15 pp, 4 figs

Scientific paper

10.1103/PhysRevD.65.054506

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.

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