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arXiv hep-ph/0209037hep-ph
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高能反应中多粒子产生的统计力学框架

A statistical mechanics framework for multi-particle production in high energy reactions

F. Buccella, L. Popova

摘要:

在力学统计的框架下推导了多强子产生的粒子碰撞中的粒子分布。它们是在所有产生粒子的总数、非弹性和总横能量固定的情况下,作为x、P_T^2和不同种类的静止质量的函数导出的。当P_T大于每个粒子的质量时,我们得到了\frac{dn_i}{dP_T} \sim \sqrt{P_T} e^{- \frac{P_T}{T_H} }的行为。<P_T><P_T><P_T>当T_H= 180 MeV(哈格多恩温度)时,得到了与实验一致的_π、_K和_{ \bar{p} }值。

英文摘要:

We deduce the particle distributions in particle collisions with multihadron-production in the framework of mechanical statistics. They are derived as functions of x, P_T^2 and the rest mass of different species for a fixed total number of all produced particles, inelasticity and total transverse energy. For P_T larger than the mass of each particle we get the behaviour \frac{dn_i}{dP_T} \sim \sqrt{P_T} e^{-\frac{P_T}{T_H}} Values of <P_T>_π, <P_T>_K, and <P_T>_{\bar{p}} in agreement with experiment are found by taking T_H=180MeV (the Hagedorn temperature).

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