Sigma Decay at Finite Temperature and Density

Abstract

Sigma decay and its relation with chiral phase transition are discussed at finite temperature and density in the framework of the Nambu-Jona-Lasinio model. The decay rate for the process sigma -> 2 pions to first order in a 1/N_c expansion is calculated as a function of temperature T and baryon density n_b. In particular, only when the chiral phase transition happens around the tricritical point, the sigma decay results in a non-thermal enhancement of pions in the final state distributions in relativistic heavy ion collisions.

6 pages, 3 Postscript figures, submitted to Chin. Phys. Lett

References in corpus (2)

• Diquark Bose Condensates in High Density Matter and Instantons
• Color Superconductivity and Chiral Symmetry Restoration at Nonzero Baryon Density and Temperature

Cited by in corpus (4)

• Decay of a scalar $\sigma$-meson near the critical end-point in the PNJL model
• Mass Spectra and Decay of Mesons under Strong External Magnetic Field
• Pion damping width and pion spectral function in hot pion gas
• Cancellation of the sigma mode in the thermal pion gas by quark Pauli blocking