中心快度区的双轻子不变质量分布

Dilepton Invariant Mass Distribution in Central Rapidity Region

推广先前作者采用的夸克和π的相空间分布函数的Ｂｏｌｔｚｍａｎｎ近似到一个完全的表示，利用快度区的温度计算出粒子密度后，在Ｂｊｏｒｋｅｎ的（１＋１）维的纵向膨胀系统中研究了双轻子的产生．发现推广的近似分布函数很大地改变了预言的夸克物质形成的特征双轻子分布．

The Boltzmann approximation of the phase-space distribution functions of quarks and of pious, previously adopted by the authors,is generalized to a complete expression.After calculating the density of particles from the temperature of the central rapidity region,the dilepton production in Bjorken's(1 + 1 )dimensional scaling expansion system is studied.We find that the generalized approximation distribution function significantly changes the characteristic dilepton distribution for the prediction of the quark matter formation.