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J/psi production and nuclear effects in p-Pb collisions at sqrt(sNN)=5.02 TeV

Abstract : Inclusive J/psi production has been studied with the ALICE detector in p-Pb collisions at sqrt(sNN) = 5.02 TeV at the CERN LHC, in the rapidity domains 2.03 < ycms < 3.53 and -4.46 < ycms < -2.96, down to zero transverse momentum. The J/psi measurement is performed in the Muon Spectrometer through the mu+ mu- decay mode. In this paper, the J/psi production cross section and the nuclear modification factor R(pPb) for the rapidities under study are presented. While at forward rapidity, corresponding to the proton direction, a suppression of the J/psi yield with respect to binary-scaled pp collisions is observed, in the backward region no suppression is present. The ratio of the forward and backward yields is also shown differentially in rapidity and transverse momentum. Theoretical predictions based on nuclear shadowing, as well as on models including, in addition, a contribution from partonic energy loss, are in fair agreement with the experimental results.
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Contributor : Sylvie Flores <>
Submitted on : Monday, September 2, 2013 - 12:19:30 PM
Last modification on : Thursday, November 19, 2020 - 12:58:53 PM

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B. Abelev, Laurent Aphecetche, Y.W. Baek, A. Baldisseri, V. Barret, et al.. J/psi production and nuclear effects in p-Pb collisions at sqrt(sNN)=5.02 TeV. Journal of High Energy Physics, Springer, 2014, 2, pp.073. ⟨10.1007/JHEP02(2014)073⟩. ⟨in2p3-00856719⟩

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