On Productions of Net-Baryons in Central Au-Au Collisions at RHIC Energies

Abstract EN

The transverse momentum and rapidity distributions of net-baryons (baryons minus antibaryons) produced in central gold-gold (Au-Au) collisions at 62.4 and 200 GeV are analyzed in the framework of a multisource thermal model.

Each source in the model is described by the Tsallis statistics to extract the effective temperature and entropy index from the transverse momentum distribution.

The two parameters are used as input to describe the rapidity distribution and to extract the rapidity shift and contribution ratio.

Then, the four types of parameters are used to structure some scatter plots of the considered particles in some three-dimensional (3D) spaces at the stage of kinetic freeze-out, which are expected to show different characteristics for different particles and processes.

The related methodology can be used in the analyses of particle production and event holography, which are useful for us to better understand the interacting mechanisms.