Elucidating the neutral mesons production at Large Hadron Collider energies in two centrality classes
Department of Physics, COMSATS University Islamabad Campus, 44000, Islamabad, Pakistan
2 Physics Department, College of Sciences, University of Ha’il, Ha’il, Saudi Arabia
3 Department of Chemistry, University of Alberta, T6G 2G2, Edmonton, AB, Canada
4 Department of Physics, Abdul Wali Khan University, 23200, Mardan, Pakistan
5 Department of Physics, Faculty of Science, Jazan University, 45142, Jazan, Saudi Arabia
Accepted: 25 August 2022
Published online: 6 September 2022
Over the past few decades, several studies of the production of neutral mesons by heavy-ion collision have been conducted, contributing to understand the properties of the quark–gluon plasma (QGP). The study is based on their photonic decay since the decay photons are the largest background for the signal from direct photons. These studies focus on how accurately they produce neutral meson and direct photons using the ALICE detector at the Large Hadron Collider (LHC). Herein, we investigate the results dealing with the production of and mesons in an intermediate kinematic range of GeV/c in two centrality classes at mid-rapidity region, namely 0–10% and 20–50%. The production of neutral mesons is simulated with Monte Carlo event generator PYTHIA8.3, and the obtained predictions are then compared with the LHC-ALICE data. The model is tuned to color reconnection, where its QCD-based aspects have been studied deeply. Our filtered results obtained within the region show a significant disagreement with LHC-ALICE data, concluding that the production of neutral mesons according to the model does not agree with the ALICE data in this particular region. However, in the later region, namely region, a decent agreement is observed between the PYTHIA8.3 predictions and the ALICE data. The predictions of color reconnection are lower than the experimental results. The observed deviations are uniquely sensitive to the kinematics used in the model, giving rise to the differences due to the multiparton interactions. Furthermore, it is found that the elucidated plateau in ratio is consistent with the picture describing the signature of flow effects such as observed in Pb–Pb collisions. Moreover, the nuclear modification factor shows a reliable behavior of suppression when compared to ALICE data, suggesting that more suppression is observed for the 0–10% centrality class and less suppression is observed for the 20–50% and 50–90% centrality class.
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