Centrality dependence of PT distributions and nuclear modification factor of charged particles in Pb–Pb interactions at SNN=2.76 TeV

• DOI: 10.1016/j.rinp.2021.104790
• Publication Date: 2021-09-23T04:34:13Z
• Authors: Muhammad Ajaz; Abd Al Karim Haj ...; Awais Ahmed; Zafar Wazir; Ramoona Shehzadi; Hannan Younis; Gulzar Khan; Rashid Khan; Sajad Ali; Muhammad Waqas; Pei-Pin Yang; Elmuez A. Dawi
• Keywords: Pseudorapidity

The simulation of transverse momentum (PT) spectra inclusive charged hadrons computed with absolute pseudorapidity below 0.8 (|η|<0.8) in different centrality bins Pb−Pb interactions at SNN=2.76TeV are reported. results obtained from Monte Carlo models including QGSJETII-03, QGSJET-04, EPOS1.99, and EPOS-LHC compared the ALICE experimental data PT range 0.15<PT<50 GeV/c, for total nine classes (0-5%) to (70-80%). model reproduced all except 20-30 30-40% where underestimated high only. QGSJET overestimated over entire up about 10%. Fit Tsallis–Pareto-like function pT shows that effective temperature depends on which increases central peripheral collisions as case fireball is longer lived one. further oriented scale nuclear modification factor RAA using a P−P collision spectrum calculated same center mass energy. Although could not reproduce but showed similar behavior only, particle suppression has significant effect PT. maximum most above there remarkable escalation factor. In interactions, smaller one nearly independent EPOS model's calculation exhibit class intervals, having robust interval due relative parton energy loss reveals least repression cases Results QGSJETII included failed predict data. reason Glauber–based based soft pomeron dynamics. does provide number binary sub-collisions we need down RAA.