Energy dependence of forward-rapidity J/ψ and ψ (2S) production in pp collisions at the LHC



Acharya, S, Adamova, D, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, Ahn, SU, Aiola, S
et al (show 1016 more authors) (2017) Energy dependence of forward-rapidity J/ψ and ψ (2S) production in pp collisions at the LHC EUROPEAN PHYSICAL JOURNAL C, 77 (6). 392-. ISSN 1434-6044, 1434-6052

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Abstract

We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J / ψ and ψ(2 S) at forward rapidity (2.5 < y< 4) as well as ψ(2 S) -to-J / ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.

Item Type: Article
Uncontrolled Keywords: ALCE Collaboration
Depositing User: Symplectic Admin
Date Deposited: 06 Jul 2017 10:03
Last Modified: 16 Jun 2026 09:14
DOI: 10.1140/epjc/s10052-017-4940-4
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3008347
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