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arXiv 0902.4171nucl-th
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相对论性重离子碰撞中核子的碰撞热化

Collision Thermalization of Nucleons in Relativistic Heavy-Ion Collisions

D. Anchishkin, A. Muskeyev, S. Yezhov

摘要:

本文讨论了相对论性重离子碰撞中核子热化的一种可能机制。我们的模型属于,在一定程度上,运输的,我们调查的系统在核-核碰撞中创建的演化,但我们参数化的发展过程中的每个粒子的碰撞次数,而不是由时间变量。我们假定核子-核子(-强子)在多次弹性碰撞和非弹性碰撞后的动量转移是一个由适当分布驱动的随机量。这种随机化导致核子动量相对于它们的初始值的模糊,结果导致它们的部分各向同性和热化。试验评估是在玩具模型的框架内进行的。我们表明,所提出的方案可以用于从实验数据中提取核子快度分布的物理信息。

英文摘要:

We consider a possible mechanism of thermalization of nucleons in relativistic heavy-ion collisions. Our model belongs, to a certain degree, to the transport ones; we investigate the evolution of the system created in nucleus-nucleus collision, but we parametrize this development by the number of collisions of every particle during evolution rather than by the time variable. We based on the assumption that the nucleon momentum transfer after several nucleon-nucleon (-hadron) elastic and inelastic collisions becomes a random quantity driven by a proper distribution. This randomization results in a smearing of the nucleon momenta about their initial values and, as a consequence, in their partial isotropization and thermalization. The trial evaluation is made in the framework of a toy model. We show that the proposed scheme can be used for extraction of the physical information from experimental data on nucleon rapidity distribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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