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 / Ï and Ï(2 S) at forward rapidity (2.5 < y< 4) as well as Ï(2 S) -to-J / Ï cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13Â 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 8Â 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>15Â GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.
|Titolo:||Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC|
|Data di pubblicazione:||2017|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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|Acharya2017_Article_EnergyDependenceOfForward-rapi.pdf||Versione Editoriale (PDF)||Open Access Visualizza/Apri|