2013/11/30 by Yu. B. Ivanov
Physics and Astronomy · #Condensed matter physics #Deconfinement #Geometry #Hadron #High-Energy Particle Collisions Research #Inverse #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Range (aeronautics) #Rapidity #Spectral line #Transverse mass #Transverse plane #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.89.024903
published as Phys. Rev. C 89, 024903 (2014) · 12 pages, 8 figures, minor changes, version accepted by Phys. Rev. C
arxiv created 2014/01/22 · openalex publication_date 2014/02/06 · arxiv updated 2014/02/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Transverse-mass spectra, their inverse slopes, and mean transverse masses in relativistic collisions of heavy nuclei are analyzed in a wide range of incident energies, 2.7 GeV \ensuremath≤√sNN\ensuremath≤ 39 GeV. The analysis is performed within the three-fluid model, employing three different equations of state (EoS): a purely hadronic EoS, an EoS with the first-order phase transition, and an EoS with a smooth crossover transition into deconfined state. Calculations show that inverse slopes and mean transverse masses of all the species (with the exception of antibaryons within the hadronic scenario) exhibit steplike behavior similar to that observed for mesons and protons in available experimental data. This steplike behavior takes place for all considered EoSs and results from the freeze-out dynamics rather than being a signal of the deconfinement transition. A good reproduction of experimental inverse slopes and mean transverse masses for light species (up to protons) is achieved within all the considered scenarios. The freeze-out parameters are precisely the same as those used for reproduction of particle yields in previous papers of this series. This became possible because the freeze-out stage is not completely equilibrium.