2015/10/06 by Somnath De, De, Somnath, Sudipan De +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Statistical Mechanics and Entropy #Theoretical and Computational Physics #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1510.01456
New figures, discussions added. To appear in Physical Review C
openalex publication_date 2015/10/06 · arxiv created 2016/10/24 · arxiv updated 2016/10/25 · openalex created_date 2016/11/04 · openalex updated_date 2026/07/28
The conditions of local thermodynamic equilibrium of baryons (non-strange, strange) and mesons (strange) are presented for central Au + Au collisions at FAIR energies using the microscopic transport model UrQMD. The net particle density, longitudinal-to-transverse pressure anisotropy and inverse slope parameters of the energy spectra of non-strange and strange hadrons are calculated inside a cell in the central region within rapidity window |y| < 1.0 at different time steps after the collision. We observed that the strangeness content is dominated by baryons at all energies, however contribution from mesons become significant at higher energies. The time scale obtained from local pressure (momentum) isotropization and thermalization of energy spectra are nearly equal and found to decrease with increase in laboratory energy. The equilibrium thermodynamic properties of the system are obtained with statistical thermal model. The time evolution of the entropy densities at FAIR energies are found very similar with the ideal hydrodynamic behaviour at top RHIC energy.