Susceptibilities, the Specific Heat and a Cumulant in Two-Flavour QCD

Details Susceptibilities, the Specific Heat and a Cumulant in Two-Flavour QCD Susceptibilities, the Specific Heat and a Cumulant in Two-Flavour QCD

1994-06-13

arxiv.org/abs/hep-lat/9406008v1

Phys.Rev. D50 (1994) 6954-6962

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages (TeX file) + 7 figures (appended as ps-files), uuencoded, Bielefeld preprint, BI-TP 94/29, June 1994

Scientific paper

10.1103/PhysRevD.50.6954

We study the quark mass dependence of various response functions, which contribute to chiral susceptibilities and the specific heat in the staggered fermion formulation of two-flavour QCD. This yields information about the critical exponents $\alpha$, $\beta$ and $\delta$. In the case of the chiral susceptibility, obtained as derivative of the chiral order parameter with respect to the quark mass, we calculate all contributions. This allows to construct a cumulant of the order parameter, which is a scaling function and yields a direct determination of the critical exponent $\delta$. All our results are consistent with a second order phase transition.

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