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Study of J/psi production and cold nuclear matter effects in pPb collisions at root S-NN=5 TeV

Research output: Contribution to journalArticle

  • R. Aaij
  • B. Adeva
  • M. Adinolfi
  • C. Adrover
  • A. Affolder
  • Z. Ajaltouni
  • J. Albrecht
  • F. Alessio
  • M. Alexander
  • S. Ali
  • G. Alkhazov
  • P. Alvarez Cartelle
  • A. A. Alves
  • S. Amato
  • S. Amerio
  • Y. Amhis
  • L. Anderlini
  • J. Anderson
  • R. Andreassen
  • J. E. Andrews
  • R. B. Appleby
  • O. Aquines Gutierrez
  • F. Archilli
  • A. Artamonov
  • M. Artuso
  • E. Aslanides
  • G. Auriemma
  • M. Baalouch
  • S. Bachmann
  • J. J. Back
  • A. Badalov
  • C. Baesso
  • V. Balagura
  • W. Baldini
  • R. J. Barlow
  • C. Barschel
  • S. Barsuk
  • W. Barter
  • Th. Bauer
  • A. Bay
  • J. Beddow
  • F. Bedeschi
  • Laurence Carson
  • P. E. L. Clarke
  • G. A. Cowan
  • Daniel Craik
  • S. Eisenhardt
  • F. Muheim
  • M. Needham
  • S. Playfer
  • LHCb Collaboration

Related Edinburgh Organisations

Original languageEnglish
Article number072
Number of pages23
JournalJournal of High Energy Physics
Issue number2
DOIs
Publication statusPublished - 18 Feb 2014

Abstract

The production of J/psi mesons with rapidity 1.5 <y <4.0 or 5.0 <y <2.5 and transverse momentum PT <14 GeV/e is studied with the LHCb detector in proton-lead collisions at a nucleon-nucleon centre-of-mass energy, root(NN)-N-S = 5 TeV. The J/psi 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/psi mesons and J/psi from b-hadron decays. Clear suppression of prompt J/psi production with respect to proton-proton collisions at large rapidity is observed, while the production of J/psi 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.

    Research areas

  • Relativistic heavy ion physics, Quarkonium, Heavy quark production, Heavy Ions, Particle and resonance production, J-PSI, HADRONIC PRODUCTION, DISTRIBUTIONS, GLUON, SUPPRESSION, DECAY, TOOL

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