Simple parametrizations of light meson properties in hot or dense matter

被引:5
作者
Caldas, HCG [1 ]
Franco, DHT [1 ]
Mota, AL [1 ]
Oliveira, FA [1 ]
Nemes, MC [1 ]
机构
[1] UNIV SAO PAULO,INST FIS,BR-01498970 SAO PAULO,BRAZIL
关键词
D O I
10.1016/S0375-9474(96)00435-6
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Sophisticated calculations of the dynamics of relativistic heavy-ion collisions often need as input properties of light mesons in medium. In this context simple analytical expressions for these quantities which respect chiral symmetry and low-energy current algebra results are most desirable. In the present work we provide such simple expressions based on a bosonized version of the microscopic NJL model. We also study the pion lifetime in hot and dense matter showing that the ratio pi(pi(-) --> mu(-) + <(nu)over bar>(mu)/pi(pi(-) --> e(-) + <(nu)over bar>(e)) changes by a factor about three and thus carries a clear signature of the chiral phase transition. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:464 / 471
页数:8
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