Final-state effects on the transverse-momentum spectra of charged hadrons in p+Pb and Pb+Pb collisions at √(sNN) = 5.02~TeV using the modified Tsallis distribution
Abstract
The ATLAS Collaboration has reported measurements of the transverse momentum (pT) spectra of charged hadrons in proton-proton (p+p), proton-lead (p+Pb), and lead-lead (Pb+Pb) collisions at a nucleon-nucleon center-of-mass energy of √(sNN) =~5.02~TeV within the rapidity interval −2.5<y<2.0. In the present work, we investigate medium effects on charged-hadron production in p+Pb and Pb+Pb collisions using a phenomenological modified Tsallis parametrization that accounts for transverse collective flow in the low-to-intermediate pT region and medium-induced parton energy loss at high pT. The modified parametrization provides a consistent description of the measured spectra over the full investigated pT range across different centrality classes. The extracted energy-loss exponent α, which characterizes the energy dependence of parton energy loss, is found to lie in the range 0.59−0.73 for p+Pb collisions and 0.32−0.59 for Pb+Pb collisions. In addition, the extracted parameters exhibit a clear centrality dependence, reflecting enhanced collective effects in central collisions. These results provide quantitative insight into the interplay between transverse collective flow and medium-induced parton energy loss in charged-hadron production at LHC energies.
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BibTeX
@misc{saraswat2026finalstate,
title = {{Final-state effects on the transverse-momentum spectra of charged hadrons in $p+Pb$ and $Pb+Pb$ collisions at $\sqrt s_\rmNN~=~5.02$~TeV using the modified Tsallis distribution}},
author = {Kapil Saraswat and Deependra Singh Rawat and Manoj Kumar Singh and Prashanta Kumar Khandai and Damini Singh and Venktesh Singh},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.08997},
eprint = {2609.08997},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.08997},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Final-state effects on the transverse-momentum spectra of charged hadrons in p+Pb and Pb+Pb collisions at √(s_NN) = 5.02~TeV using the modified Tsallis distribution
AU - Kapil Saraswat
AU - Deependra Singh Rawat
AU - Manoj Kumar Singh
AU - Prashanta Kumar Khandai
AU - Damini Singh
AU - Venktesh Singh
PY - 2026
DA - 2026/09/08
PB - arXiv
DO - 10.48550/arxiv.2609.08997
UR - https://arxiv.org/abs/2609.08997
AB - The ATLAS Collaboration has reported measurements of the transverse momentum (p_T) spectra of charged hadrons in proton-proton (p+p), proton-lead (p+Pb), and lead-lead (Pb+Pb) collisions at a nucleon-nucleon center-of-mass energy of √(s_NN) =~5.02~TeV within the rapidity interval −2.5<y<2.0. In the present work, we investigate medium effects on charged-hadron production in p+Pb and Pb+Pb collisions using a phenomenological modified Tsallis parametrization that accounts for transverse collective flow in the low-to-intermediate p_T region and medium-induced parton energy loss at high p_T. The modified parametrization provides a consistent description of the measured spectra over the full investigated p_T range across different centrality classes. The extracted energy-loss exponent α, which characterizes the energy dependence of parton energy loss, is found to lie in the range 0.59−0.73 for p+Pb collisions and 0.32−0.59 for Pb+Pb collisions. In addition, the extracted parameters exhibit a clear centrality dependence, reflecting enhanced collective effects in central collisions. These results provide quantitative insight into the interplay between transverse collective flow and medium-induced parton energy loss in charged-hadron production at LHC energies.
ER -