Phys. Rev. D 39, 2805–2808 (1989)Linear sigma model with parity doublingReceived 27 May 1988; published in the issue dated 1 May 1989 Recent lattice-gauge-theory simulations at finite temperatures have suggested that chiral-symmetry restoration at finite temperatures entails parity doubling of the baryon spectrum. We show that a natural extension of the Gell-Mann–Lévy model incorporates this effect. Predictions of this candidate effective model for the hadronic component of high-density and high-temperature nuclear matter are discussed. The model suggests a parametrization of the dependence of the baryon-doublet masses on the quark mass. This parametrization is compared with the recent lattice results. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.39.2805
DOI:
10.1103/PhysRevD.39.2805
PACS:
11.40.Fy, 11.30.Rd, 12.38.Mh, 14.20.Gk
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