https://doi.org/10.1140/epjp/s13360-023-04351-0
Regular Article
Distributions of the nuclear modification factor of pions, kaons and protons in the most central Pb–Pb collisions at 
= 2.76 TeV
1
Qurtuba University of Science and Information Technology, 25000, Khyber Pakhtunkhwa, Pakistan
2
Department of Physics, COMSATS University, Park Road, 44000, Islamabad, Pakistan
3
Baku State University, Academician ZakhidKhalilov, AZ1148, Baku, Azerbaijan
4
Department of Physics, International Islamic University, 44000, Islamabad, Pakistan
Received:
5
January
2023
Accepted:
2
August
2023
Published online:
24
August
2023
In this research article, we studied the behavior of the yields and Nuclear Modification Factors (NMFs) of the π±, K± mesons, and for the protons/antiprotons in the mid rapidity region as a function of pT (in the pT < 20 GeV/c region). Additionally, we analyzed the ratios of yields of K± mesons and protons/antiprotons to the yields of π± mesons as a function of pT in the most central Pb-Pb collisions at center of mass energy, = 2.76 TeV. Our results were obtained using the EPOS-1.99, DPMJETIII-2017.1, and EPOS-LHC models, which were compared with the experimental data from the ALICE experiment. We found that the models gave similar results and effectively described the experimental data, which we attributed to the fact that the models used similar dynamics (string fragmentation) to describe the data in the considered pT region. We observed several regions for the distribution of NMFs, with the boundary values being approximately the same as those reported in a previous study, which we explained as a signal of string fragmentation and decay. We also confirmed the existence of these regions using the ratios of the yields for the particles, which showed that physics in the second and third pT regions differed from that in the first region. Lastly, our results suggested that the parton structure of matter dominated in the second and third pT regions.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
