Energy dependence of forward-rapidity J/ψ and ψ(2S) production in pp collisions at the LHCстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 августа 2017 г.
Аннотация:We present results on transverse momentum ( p\textsct ) 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 p\textsct range, provided that both contributions are summed. In particular, it is found that for p\textsct>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.