Pseudorapidity distribution of charged particles and spatial structure pictures of interacting system in central d–Au collisions at RHIC energy

Abstract

To extract more information from limited measurable quantities in experiments, the pseudorapidity distribution of charged particles produced in central deuteron–gold (d–Au) collisions at center-of-mass energy $$\sqrt{s_{NN}}=200$$ GeV is analyzed in the framework of a multisource thermal model. Some parameter values are extracted from the analysis to describe other distributions such as the distributions of rapidities in different directions. Different distributions contributed by regions of different sources are given. At the same time, these parameter values are used to describe spatial structure pictures of interacting systems at the stage of kinetic freeze-out in the rapidity, momentum, and velocity (coordinate) spaces. To check the implementation of Tsallis statistics, the sources in the model are described by Tsallis statistics, instead of the traditional Boltzmann–Gibbs statistics.