Inclusive J/ψ production in pp collisions at √s=2.76 TeV
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Publication date
2012
Authors
Abelev, B.I.
Adam, J.
Bjelogrlic, S
Chojnacki, M.
Christakoglou, P.
de Rooij, R. S.
Grelli, A.
Luparello, G.
Mischke, A.
Nooren, G
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Abstract
The ALICE Collaboration has measured inclusive J/ψ production in pp collisions at a center-of-mass energy √ s = 2.76 TeV at the LHC. The results presented in this Letter refer to the rapidity ranges |y| <0.9 and 2.5 <y <4 and have been obtained by measuring the electron and muon pair decay channels, respectively. The integrated luminosities for the two channels are Le int = 1.1 nb−1 and Lμ int = 19.9 nb−1, and the corresponding signal statistics are Ne+e− J/ψ = 59 ± 14 and Nμ + μ − J/ψ = 1364 ± 53. We present dσJ/ψ /dy for the two rapidity regions under study and, for the forward-y range, d2σJ/ψ /dy dpt in the transverse momentum domain 0 <pt <8 GeV/c. The results √ are compared with previously published results at s = 7 TeV and with theoretical calculations
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Abelev, B I, Adam, J, Bjelogrlic, S, Chojnacki, M, Christakoglou, P, de Rooij, R S, Grelli, A, Luparello, G, Mischke, A, Nooren, G J L, Peitzmann, T, Reicher, M, Snellings, R J M, Thomas, D, van Leeuwen, M, Veldhoen, M, Verweij, M, Zhou, Y & Zynovyev, M 2012, 'Inclusive J/ψ production in pp collisions at √s=2.76 TeV', Physics Letters B, vol. 718, no. 2, pp. 295-306. https://doi.org/10.1016/j.physletb.2012.10.078