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 σ → 2π to first order in 1/Nc (inverse number of colors) expansion is calculated as a function of temperature T and baryon density nb. In particular, only when the chiral phase transition happens around the tricritical point, the σ decay results in a non-thermal enhancement of pions in the final state distributions in relativistic heavy ion collisions.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
引用本文:
ZHUANG Peng-Fei;YANG Zhen-Wei
. Sigma Decay at Finite Temperature and Density
[J]. 中国物理快报, 2001, 18(3): 344-346.
ZHUANG Peng-Fei, YANG Zhen-Wei
. Sigma Decay at Finite Temperature and Density
. Chin. Phys. Lett., 2001, 18(3): 344-346.
2001, Vol. 18 
