Regular Article – Theoretical Physics
Dependence of related parameters on centrality and mass in a new treatment for transverse momentum spectra in high energy collisions
Institute of Theoretical Physics, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, 030006, Taiyuan, Shanxi, People’s Republic of China
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, 030006, Taiyuan, Shanxi, People’s Republic of China
Accepted: 29 January 2021
Published online: 18 February 2021
We collected the experimental data of transverse momentum spectra of identified particles produced in proton–proton (p–p), deuteron-gold (d–Au or d–A), gold–gold (Au–Au or A–A), proton–lead (p–Pb or p–A), and lead–lead (Pb–Pb or A–A) collisions measured by the ALICE, CMS, LHCb, NA49, NA61/SHINE, PHENIX, and STAR Collaborations at different center-of-mass energies. The multisource thermal model at the quark level or the participant quark model is used to describe the experimental data. The free parameters, the effective temperature T, entropy-related index n, and revised index , in the revised Tsallis–Pareto-type function are extracted at the quark level. In most cases, T and n in central collisions are larger than those in peripheral collisions, and does not change in different centrality classes. With the increase in the mass of the produced particle or participant quark, T and increase, and n does not change significantly. The behaviors of related parameters from p–p, p(d)–A, and A–A collisions are similar.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021