2019/10/31 by Abhirikshma Nandi, Lokesh Kumar, L. Kumar +2
Engineering · Mathematics · Physics and Astronomy · #Centrality #Combinatorics #Hadron #High-Energy Particle Collisions Research #Mathematical physics #Mathematics #Nuclear physics #Nuclear reactor physics and engineering #Observable #Particle physics #Parton #Physics #Pion #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scattering #hep-ph #nucl-ex
paper · pdf · doi:10.1103/physrevc.102.024902
published as Phys. Rev. C 102, 024902 (2020) · 16 pages with 8 captioned figures. The updated version is modified in accordance with the published version
openalex publication_date 2020/08/05 · openalex created_date 2020/08/13 · arxiv created 2020/08/21 · arxiv updated 2020/08/24 · openalex updated_date 2026/08/05
We study the production of pions, kaons, and (anti)protons using a multiphase transport (AMPT) model in Au+Au collisions at √sNN= 7.7, 27, and 200 GeV. We present the centrality and energy dependence of various bulk observables such as invariant yields as a function of transverse momentum pT, particle yields dN/dy, average transverse momentum \ensuremath⟨pT\ensuremath⟩, and various particle ratios, and compare them with experimental data. Both default and string melting (SM) versions of the AMPT model are used with three different sets of initial conditions. We observe that neither the default nor the SM version of the model could consistently describe the centrality dependence of all observables at the above energies with any one set of initial conditions. The energy dependence behavior of the experimental observables for 0--5% central collisions is in general better described by the default AMPT model using the modified hijing parameters for Lund string fragmentation and 3 mb parton scattering cross section. In addition, the kaon production as well as the K/\ensuremathπ ratio at 7.7 GeV are underpredicted by the AMPT model.