Measurement of quarkonium production at forward rapidity in pp collisions at √s = 7 TeV

Abelev, B. and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Zyzak, M. (ALICE Collaboration) (2014) Measurement of quarkonium production at forward rapidity in pp collisions at √s = 7 TeV. European Physical Journal C, 74 (8). pp. 2974-21. ISSN 1434-6044

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The inclusive production cross sections at forward rapidity of J/ψ, ψ(2S), ϒ(1S) and ϒ(2S) are measured in pp collisions at √s = 7 TeV with the ALICE detector at the LHC. The analysis is based on 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 μ+μ− 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/ψ, 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: σJ/ψ = 6.69 ± 0.04 ± 0.63 µb, σψ(2S) = 1.13 ± 0.07 ± 0.19 µb, σϒ(1S) = 54.2 ± 5.0 ± 6.7 nb and σϒ(2S) = 18.4 ± 3.7 ± 2.9 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.

Item Type: Article
Keywords: ALICE, 7 TeV, pp, quarkonium
Date: August 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: © CERN for the benefit of the ALICE collaboration 2014. This article is published with open access at Article funded by SCOAP3. Received: 10 April 2014. Accepted: 9 July 2014. Published online: 13 August 2014.
Divisions: Faculty of Science > Department of Physics
Project code: 098-0982887-2878, 119-0982887-1006
Publisher: Springer
Depositing User: Nikola Poljak
Date Deposited: 01 May 2015 19:50
Last Modified: 29 May 2016 19:51

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