Study of freeze-out dynamics in STAR at RHIC Beam Energy Scan Program

14th International Conference on Strangeness in Quark Matter

Das, Sabita^1

Institute of Physics, Bhubaneswar-751005, INDIA Brookhaven National Laboratory, Upton, NY 11973-5000, United States^1

关键词: Au+Au collisions;    Canonical ensemble;    Heavy ion collision;    Particle identifications;    Particle production;    Particle ratios;    Statistical-thermal models;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012066/pdf
DOI  :  10.1088/1742-6596/509/1/012066

来源: IOP

【 摘 要 】

The STAR detector at RHIC, due to its large uniform acceptance and excellent particle identification capabilities, has measured a variety of hadron species (π±, K±, p, , K0s, Λ, , Ξ-, ) produced in Au+Au collisions at 7.7, 11.5, 27 and 39 GeV. These data are part of the Beam Energy Scan (BES) program at RHIC and provide an opportunity to measure the yields and transverse momentum spectra (pT) of the particles produced in the collisions. The corresponding measurements allow to study the freeze-out properties and dynamics of heavy ion collisions. A statistical thermal model analysis of particle production in BES energies in both grand canonical and strangeness canonical ensembles, is used to extract the chemical freeze-out parameters. The pTspectra, particle ratios, and the energy and centrality dependence of freeze-out parameters determined from the thermal fit of particle ratios are discussed.