Scaling of Pseudo-Critical Couplings in Two-Flavour QCD

Details Scaling of Pseudo-Critical Couplings in Two-Flavour QCD Scaling of Pseudo-Critical Couplings in Two-Flavour QCD

1993-09-30

arxiv.org/abs/hep-lat/9309022v1

Phys.Rev. D49 (1994) 3791-3794

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, NSF-ITP 93-121

Scientific paper

10.1103/PhysRevD.49.3791

We study the scaling behaviour of the pseudo-critical couplings for the chiral phase transition in two-flavour QCD. We show that all existing results from lattice simulations on lattices with temporal extent $N_\tau = 4$, 6 and 8 can be mapped onto a universal scaling curve. The relevant combination of critical exponents, $\beta\delta$, is consistent with the scaling behaviour expected for a second order phase transition with $O(4)$ exponents. At present, scaling according to the $O(2)$ symmetry group can, however, not be ruled out.

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