Study of ϒ Production and Cold Nuclear Matter Effects in pPb Collisions at √s[subscript NN] = 5 TeV
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Aaij-2014-Study of production.pdf
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Author(s)
Counts, Ian Thomas Hunt
Williams, Michael
Ilten, Philip J
Date Issued
July 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, et al. “Study of ϒ Production and Cold Nuclear Matter Effects in pPb Collisions at √s[subscript NN] = 5 TeV.” J. High Energ. Phys. 2014, no. 7 (July 2014). © CERN, for the benefit of the LHCb Collaboration
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Final published version
Abstract
Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy √s[subscript NN] = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb[superscript −1]. The Υ mesons of transverse momenta up to 15 GeV/c are reconstructed in the dimuon decay mode. The rapidity coverage in the centre-of-mass system is 1.5 < y < 4.0 (forward region) and −5.0 < y < −2.5 (backward region). The forward-backward production ratio and the nuclear modification factor for Υ (1S) mesons are determined. The data are compatible with the predictions for a suppression of Υ (1S) production with respect to proton-proton collisions in the forward region, and an enhancement in the backward region. The suppression is found to be smaller than in the case of prompt J/ψ mesons.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1007/jhep07(2014)094
