Measurement of quarkonium production at forward rapidity in pp collisions at sqrt{s}= 7 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles European Physical Journal C: Particles and Fields Year : 2014

Measurement of quarkonium production at forward rapidity in pp collisions at sqrt{s}= 7 TeV

B. Abelev
  • Function : Author
Laurent Aphecetche
Guillaume Batigne
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

Abstract

The inclusive production cross sections at forward rapidity of J/psi, psi(2S), Upsilon(1S) and Upsilon(2S) are measured in pp collisions at sqrt{s} = 7 TeV with the ALICE detector at the LHC. The analysis is based in a data sample corresponding to an integrated luminosity of 1.35 pb^-1. Quarkonia are reconstructed in the dimuon-decay channel and the signal yields are evaluated by fitting the mu+mu- invariant mass distributions. The differential production cross sections are measured as a function of the transverse momentum pt and rapidity y, over the ranges 0 < pt < 20 GeV/c for J/psi, 0 < pt < 12 GeV/c for all other resonances and for 2.5 < y < 4. The measured cross sections integrated over pt and y, and assuming unpolarized quarkonia, are: sigma_{J/psi} = 6.69 +- 0.04 +- 0.63 microbarn, sigma_{psiprime} = 1.13 +- 0.07 +- 0.14 microbarn, sigma_{Upsilon(1S)} = 54.2 +- 5.0 +- 6.7 nb and sigma_{Upsilon(2S)} = 18.4 +- 3.7 +- 2.2 nb, where the first uncertainty is statistical and the second one is systematic. The results are compared to measurements performed by other LHC experiments and to theoretical models.

Dates and versions

in2p3-00959806 , version 1 (17-03-2014)

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Cite

B. Abelev, Laurent Aphecetche, Guillaume Batigne, C. Cheshkov, B. Cheynis, et al.. Measurement of quarkonium production at forward rapidity in pp collisions at sqrt{s}= 7 TeV. European Physical Journal C: Particles and Fields, 2014, 74, pp.2974. ⟨10.1140/epjc/s10052-014-2974-4⟩. ⟨in2p3-00959806⟩
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