Energy dependence of forward-rapidity J/ψ and ψ(2S) production in pp collisions at the LHC
ALICE Collaboration. (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. doi:10.1140/epjc/s10052-017-4940-4
Published inEuropean Physical Journal C
Rak, Jan |
© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License. Funded by SCOAP3.
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(2S) at forward rapidity (2.5 < y < 4) as well as ψ(2S)-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. ...