CHIRAL SYMMETRY RESTORATION IN THE LINEAR SIGMA MODEL

H. Meyer-Ortmanns, H.-J. Pirner and A. Patkós
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H. Meyer-Ortmanns: Institute of Theoretical Physics, University of Heidelberg, Philosophenweg 19, 6900 Heidelberg, Germany
H.-J. Pirner: Institute of Theoretical Physics, University of Heidelberg, Philosophenweg 19, 6900 Heidelberg, Germany
A. Patkós: Physics Department, R. Eötvös University, Puskin u. 5–7, 1088 Budapest, Hungary

International Journal of Modern Physics C (IJMPC), 1992, vol. 03, issue 05, 993-1009

Abstract: We report on results about the mass sensitivity of chiral symmetry restoration in the linear sigma model. For masses of the pseudoscalar meson octet which are close to the experimental values, we observed only a gradual change in the order parameters, when the temperature was changed. To estimate the size of the first order transition region around the chiral limit, we have varied the mass input for the tree level parametrization in several ways. The point with realistic meson masses turned out to lie well inside the crossover region.

Keywords: Linear sigma model; finite temperature; chiral symmetry; mass dependence; crossover phenomenon (search for similar items in EconPapers)
Date: 1992
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DOI: 10.1142/S0129183192000658

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