Mean field exponents and small quark masses
نویسندگان
چکیده
We demonstrate that the restoration of chiral symmetry at finite-T in a class of confining Dyson-Schwinger equation (DSE) models of QCD is a mean field transition, and that an accurate determination of the critical exponents using the chiral and thermal susceptibilities requires very small values of the currentquark mass: log10(m/mu) ∼< −5. Other classes of DSE models characterised by qualitatively different interactions also exhibit a mean field transition. Incipient in this observation is the suggestion that mean field exponents are a result of the gap equation’s fermion substructure and not of the interaction. Typeset using REVTEX
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