Aaij, R.Alfonso Albero, AlejandroGarcia Moreno, PaulaGarrido Beltrán, LluísGironella Gironell, PereGomez Fernandez, S.Graugés Pous, EugeniLobo Salvia, AniolMarin Benito, CarlaMauricio, J.Vazquez Gomez, RicardoLHCb Collaboration2025-04-252025-04-2520231434-6044https://hdl.handle.net/2445/220620The first measurement of J/ψ and D0 production in PbNe collisions by the LHCb experiment in its fixed-target configuration is reported. The production of J/ψ and D0 mesons is studied with a beam of lead ions with an energy of 2.5 TeV per nucleon colliding on gaseous neon targets at rest, corresponding to a nucleon-nucleon centre-of-mass energy of √sNN = 68.5 GeV. The J/ψ/D0 production crosssection ratio is studied as a function of rapidity, transverse momentum and collision centrality. These data are compared with measurements from pNe collisions at the same energy and show no difference in the observed J/ψ suppression trend when comparing pNe and PbNe peripheral collisions with PbNe central collisions11 p.application/pdfengcc-by (c) Aaij, R. et al., 2023http://creativecommons.org/licenses/by/4.0/Col·lisions (Física)HadronsFísica de partículesCollisions (Physics)HadronsParticle physicsinfo:eu-repo/semantics/article7577332025-04-25info:eu-repo/semantics/openAccess