Comprehensive study of Υ(nS) production in Oxygen+Oxygen collisions at LHC
Abstract
We study bottomonium Υ(nS) production in O+O collisions at √(sNN)=5.36~TeV, including both cold nuclear-matter (CNM) effects and final-state interactions in a short-lived quark-gluon plasma. The CNM baseline is calculated using the EPPS21 nuclear parton distribution functions together with coherent energy loss and transverse momentum broadening. Hot-medium effects are evaluated with two transport approaches coupled to the same centrality-resolved 3+1D aHydroQP background: the QTRAJ-NLO open-quantum-system calculation, implemented with the {\sc QTraj} code, and the TAMU-NP semiclassical rates, including primordial suppression and regeneration. The CNM effects give a moderate, state-independent suppression, dominated by the nPDF modification. The energy loss and transverse momentum broadening contribution remains at the few-percent level. Both transport approaches predict a sequential suppression pattern, RAAΥ(1S)>RAAΥ(2S)>RAAΥ(3S), with the strongest suppression around midrapidity in central collisions. The suppression of the ground state is similar in the two approaches but differs for the excited states. Since the CNM factor is common to all states, double ratios provide a direct measure of the relative hot-medium suppression. Our results support the conclusion that O+O collisions at the LHC can produce a short-lived QGP capable of modifying bottomonium yields.
Related
- Observation of enhanced baryon production using strange hadrons in oxygen-oxygen collisions
- Photoproduction of J/Ψ in peripheral Oxygen-Oxygen collisions
- Centrality dependence of charged-hadron pseudorapidity distributions in oxygen-oxygen collisions at √(sNN) = 5.36 TeV
- Multiplicity and transverse density as ordering variables of the Λ/K0S ratio in oxygen-oxygen collisions at the LHC
- Theoretical Review on Bulk Properties and Light/Strange Hadron Production in Heavy-Ion Collisions
BibTeX
@misc{thapa2026comprehensive,
title = {{Comprehensive study of $Υ$($n$S) production in Oxygen+Oxygen collisions at LHC}},
author = {Sabin Thapa and Biaogang Wu and Ramona Vogt and Ralf Rapp},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.16292},
eprint = {2609.16292},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.16292},
}
RIS
TY - UNPB
TI - Comprehensive study of Υ(nS) production in Oxygen+Oxygen collisions at LHC
AU - Sabin Thapa
AU - Biaogang Wu
AU - Ramona Vogt
AU - Ralf Rapp
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2609.16292
UR - https://arxiv.org/abs/2609.16292
AB - We study bottomonium Υ(nS) production in O+O collisions at √(s_NN)=5.36~TeV, including both cold nuclear-matter (CNM) effects and final-state interactions in a short-lived quark-gluon plasma. The CNM baseline is calculated using the EPPS21 nuclear parton distribution functions together with coherent energy loss and transverse momentum broadening. Hot-medium effects are evaluated with two transport approaches coupled to the same centrality-resolved 3+1D aHydroQP background: the QTRAJ-NLO open-quantum-system calculation, implemented with the {\sc QTraj} code, and the TAMU-NP semiclassical rates, including primordial suppression and regeneration. The CNM effects give a moderate, state-independent suppression, dominated by the nPDF modification. The energy loss and transverse momentum broadening contribution remains at the few-percent level. Both transport approaches predict a sequential suppression pattern, R_AA^Υ(1S)>R_AA^Υ(2S)>R_AA^Υ(3S), with the strongest suppression around midrapidity in central collisions. The suppression of the ground state is similar in the two approaches but differs for the excited states. Since the CNM factor is common to all states, double ratios provide a direct measure of the relative hot-medium suppression. Our results support the conclusion that O+O collisions at the LHC can produce a short-lived QGP capable of modifying bottomonium yields.
ER -