https://doi.org/10.1140/epjp/s13360-022-03548-z
Regular Article
Charged-particles distribution in proton–proton and heavy-ion collisions using PYTHIA8 Angantyr model at LHC energies
1
High Energy Nuclear & Particle Physics Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, 700064, Kolkata, India
2
Variable Energy Cyclotron Centre (VECC), HBNI, 1/AF Bidhannagar, 700064, Kolkata, India
Received:
15
February
2022
Accepted:
27
November
2022
Published online:
9
December
2022
We have performed the production of primary charged-particles in systems: pp (
= 0.9, 2.76, 5.02, 7 and 13 TeV), Xe–Xe (
= 5.44 TeV) and Pb–Pb ( = 2.76 and 5.02 TeV) using Angantyr model in PYTHIA8 with default settings. The production of charged-particles has been measured at mid-rapidity 
0.8 as a function of transverse momentum (p
) for p–p and heavy-ion collisions and contrasted with available ALICE data. The default settings in the model add the multiple-parton interaction based color reconnection (CR) mechanism to make an agreement with collectivity encoded in the published ALICE data, especially in p–p collisions. The results of average transverse momentum (
) as a function of charged-particle multiplicity (
) at mid-rapidity 0.3 (
GeV/c) show the collective effect in p–p collision. The same observable is studied in heavy-ion collisions. Here, the effect of CR mechanism has been demonstrated in the qualitative evolution of the spectral shapes. In addition to the particle spectra, the observable nuclear modification factor (R
) is studied for center-of-mass energies = 2.76 and 5.02 TeV in Pb–Pb collisions. The R versus 
spectra show that ALICE data overestimate the simulated R results after p
15 GeV/c for both the energies. Lastly, the predictions are given for the charged-particles -distribution at four centrality classes and 
versus in O–O collision at = 6.37 TeV.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. 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.
