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Back, J. J.; Craik, Daniel; Dossett, D.; Gershon, T. J.; Harrison, P. F.; Kreps, Michal; Pilar, T.; Latham, Thomas; Poluektov, Anton; Reid, Matthew M.; Whitehead, M. (Mark); Williams, M. P.; Silva Coutinho, R.; HASH(0x55897e40a3d0) (2013)
Publisher: American Physical Society
Languages: English
Types: Article
Subjects: QC

Classified by OpenAIRE into

arxiv: High Energy Physics::Experiment, Nuclear Experiment, Nuclear Theory
The production of J/ψ mesons with rapidity 1.5 < y < 4.0 or −5.0 < y < −2.5 and transverse momentum p T < 14 GeV/c is studied with the LHCb detector in proton-lead collisions at a nucleon-nucleon centre-of-mass energy √sNN = 5TeV. The J/ψ mesons are reconstructed using the dimuon decay mode. The analysis is based on a data sample corresponding to an integrated luminosity of about 1.6 nb−1. For the first time the nuclear modification factor and forward-backward production ratio are determined separately for prompt J/ψ mesons and J/ψ from b-hadron decays. Clear suppression of prompt J/ψ production with respect to proton-proton collisions at large rapidity is observed, while the production of J/ψ from b-hadron decays is less suppressed. These results show good agreement with available theoretical predictions. The measurement shows that cold nuclear matter effects are important for interpretations of the related quark-gluon plasma signatures in heavy-ion collisions.

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