2026-04-17T11:47:55Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/2206292025-12-05T16:10:23Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
RECERCAT
author
Alfonso Albero, Alejandro
author
Garcia Moreno, Paula
author
Garrido Beltrán, Lluís
author
Gironella Gironell, Pere
author
Gomez Fernandez, S.
author
Graugés Pous, Eugeni
author
Lobo Salvia, Aniol
author
Marin Benito, Carla
author
Mauricio, J.
author
Vazquez Gomez, Ricardo
author
LHCb collaboration
2025-04-25T13:49:23Z2025-04-25T13:49:23Z20232025-04-25T13:49:23Z
The measurement of charmonium states produced in proton-neon (pNe) collisions by the LHCb experiment in its fixed-target configuration is presented. The production of J/ψ and ψ(2S) mesons is studied with a beam of 2.5 TeV protons colliding on gaseous neon targets at rest, corresponding to a nucleon-nucleon centre-of-mass energy √sNN = 68.5 GeV. The data sample corresponds to an integrated luminosity of 21.7 ± 1.4 nb−1. The J/ψ and ψ(2S) hadrons are reconstructed in μ+μ− final states. The J/ψ production cross-section per target nucleon in the centre-ofmass rapidity range y ∈ [−2.29, 0] is found to be 506 ± 8 ± 46 nb/nucleon. The ratio of J/ψ and D0 cross-sections is evaluated to (1.06 ± 0.02 ± 0.09)%. The ψ(2S) to J/ψ relative production rate is found to be (1.67±0.27±0.10)% in good agreement with other measurements involving beam and target nuclei of similar sizes
cc-by (c) LHCb collaboration, 2023 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess
Charmonium production in pNe collisions at √sNN = 68.5 GeV
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion