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Sigma Decay at Finite Temperature and Density
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| ZHUANG Peng-Fei;YANG Zhen-Wei
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| Department of Physics, Tsinghua University, Beijing 100084
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| Cite this article: |
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ZHUANG Peng-Fei, YANG Zhen-Wei 2001 Chin. Phys. Lett. 18 344-346 |
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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.
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| Keywords:
11.10.Wx
12.38.Mh
25.75.-q
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Published: 01 March 2001
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| PACS: |
11.10.Wx
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(Finite-temperature field theory)
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12.38.Mh
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(Quark-gluon plasma)
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25.75.-q
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(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))
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