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Title: Measurement of differential J/ψ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector

Measurements of differential cross sections for J/ψ production in p + Pb collisions at √sNN=5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb-1. The J/ψ mesons are reconstructed in the dimuon decay channel over the transverse momentum range 8< pT< 30GeV and over the center-of-mass rapidity range -2.87 < y*< 1.94. Prompt J/ψ are separated from J/ψ resulting from b-hadron decays through an analysis of the distance between the J/ψ decay vertex and the event primary vertex. The differential cross section for production of nonprompt J/ψ is compared to a FONLL calculation that does not include nuclear effects. Forward-backward production ratios are presented and compared to theoretical predictions. These results complement previously published results by covering a region of higher transverse momentum and more central rapidity. They constrain the kinematic dependence of nuclear modifications of charmonium and b-quark production in p + Pb collisions.
Authors:
 [1]
  1. Aix-Marseille Universite (France). et al.
Publication Date:
OSTI Identifier:
1215761
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; SC0012704; AC02-76CH03000
Type:
Published Article
Journal Name:
Physical Review. C, Nuclear physics
Additional Journal Information:
Journal Volume: 92; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
ATLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS