Study of J/ψ production and cold nuclear matter effects in pPb collisions at √s[subscript NN] = 5 TeV
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Aaij-2014-Study of J_ producti.pdf
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Author(s)
Williams, Michael
Date Issued
February 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Study of J/ψ Production and Cold Nuclear Matter Effects in pPb Collisions at √s[subscript NN] = 5 TeV.” J. High Energ. Phys. 2014, no. 2 (February 2014). © CERN, for the benefit of the LHCb Collaboration
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Author's final manuscript
Abstract
The production of J/ψ mesons with rapidity 1.5 < y < 4.0 or −5.0 < y < −2.5 and transverse momentum p [subscript 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[superscript −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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP02(2014)072
