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Lattice-QCD based Schwinger-Dyson approach for Chiral Phase Transition | Hideaki Iida
; Makoto Oka
; Hideo Suganuma
; | Date: |
15 Oct 2004 | Subject: | hep-ph | Abstract: | Dynamical chiral-symmetry breaking in QCD is studied with the Schwinger-Dyson (SD) formalism based on lattice QCD data, i.e., LQCD-based SD formalism. We extract the SD kernel function $K(p^2)$ in an Ansatz-independent manner from the lattice data of the quark propagator in the Landau gauge. As remarkable features, we find infrared vanishing and intermediate enhancement of the SD kernel function $K(p^2)$. We apply the LQCD-based SD equation to thermal QCD with the quark chemical potential $mu_q$. We find chiral symmetry restoration at $T_c simeq 100{
m MeV}$ for $mu_q=0$. The real part of the quark mass function decreases as $T$ and $mu_q$. At finite density, there appears the imaginary part of the quark mass function, which would lead to the width broadening of hadrons. | Source: | arXiv, hep-ph/0410222 | Services: | Forum | Review | PDF | Favorites |
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