Inclusive J/psi production at forward and backward rapidity in p-Pb collisions at root s(NN)=8.16 TeV
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J. and Zou, S. and ALICE Collaboration... Show more Show less
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Abstract
Inclusive J/psi production is studied in p-Pb interactions at a
centre-of-mass energy per nucleon-nucleon collision root s(NN) = 8.16
TeV, using the ALICE detector at the CERN LHC. The J/psi meson is
reconstructed, via its decay to a muon pair, in the centreof-mass
rapidity intervals 2.03 < Y-cms < 3.53 and -4.46 < Y-cms < -2.96, where
positive and negative Y(cms )refer to the p-going and Pb-going
direction, respectively. The transverse momentum coverage is PT < 20
GeV/c. In this paper, Y-cms- aand P-T-differential cross sections for
inclusive J/psi production are presented, and the corresponding nuclear
modification factors R-pPb are shown. Forward results show a suppression
of the J/psi yield with respect to pp collisions, concentrated in the
region P-T less than or similar to 5 GeV/c. At backward rapidity no
significant suppression is observed. The results are compared to
previous measurements by ALICE in p-Pb collisions at root s(NN) = 5.02
TeV and to theoretical calculations. Finally, the ratios R-FB between
forward- and backward-Y-cms R-pPb values are shown and discussed.... Show more Show less