J/psi production and nuclear effects in p-Pb collisions at sqrt(sNN)=5.02 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of High Energy Physics Year : 2014

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

B. Abelev
  • Function : Author
Laurent Aphecetche
B. Cheynis
B. Erazmus
  • Function : Author
  • PersonId : 1178907
  • IdRef : 033726485
Magali Estienne
Marie Germain
Maxime Guilbaud
Gines Martinez Garcia
Philippe Pillot
C. Roy
Alexandre Shabetai
Diego Stocco
I. Das
  • Function : Author

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.

Dates and versions

in2p3-00856719 , version 1 (02-09-2013)

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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, 2014, 2, pp.073. ⟨10.1007/JHEP02(2014)073⟩. ⟨in2p3-00856719⟩
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