Inclusive J/ψ production at mid-rapidity in pp collisions at √s = 5.02 TeV

Abstract

Inclusive J/ψ production is studied in minimum-bias proton-proton collisions at a centre-of-mass energy of √ s = 5.02 TeV by ALICE at the CERN LHC. The measurement is performed at mid-rapidity (|y| < 0.9) in the dielectron decay channel down to zero transverse momentum pT, using a data sample corresponding to an integrated luminosity of Lint = 19.4 ± 0.4 nb−1 . The measured pT-integrated inclusive J/ψ production cross section is dσ/dy = 5.64 ± 0.22(stat.) ± 0.33(syst.) ± 0.12(lumi.) µb. The pT-differential cross section d2σ/dpTdy is measured in the pT range 0–10 GeV/c and compared with state-ofthe-art QCD calculations. The J/ψ hpTi and hp 2 T i are extracted and compared with results obtained at other collision energies.