Nonequilibrium distribution functions of nucleons in relativistic nucleus-nucleus collisions


The collision smearing of the nucleon momenta about their initial values during relativistic nucleus-nucleus collisions is investigated. To a certain degree, our model belongs to the transport type, and we investigate the evolution of the nucleon system created at a nucleus-nucleus collision. However, we parameterize this development by the number of collisions of every particle during evolution rather than by the time variable. It is assumed that the group of nucleons which leave the system after the same number of collisions can be joined in a particular statistical ensemble. The nucleon nonequilibrium distribution functions, which depend on a certain number of collisions of a nucleon before freeze-out, are derived. Key words: relativistic collisions, nonequilibrium distribution function, nucleon spectrum, parametrization of evolution PACS: 25.75.-q, 25.75.Gz, 12.38.Mh 1

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