Inclusive text {J}/psi production at midrapidity in pp collisions at sqrt{s} = 13 TeV

Abstract

We report on the inclusive text {J}/psi production cross section measured at the CERN Large Hadron Collider in proton–proton collisions at a center-of-mass energy sqrt{s}~=~13 TeV. The text {J}/psi mesons are reconstructed in the text {e}^{+}text {e}^{-} decay channel and the measurements are performed at midrapidity (|y|<0.9) in the transverse-momentum interval 0<p_{mathrm{T}} <40 GeV/c, using a minimum-bias data sample corresponding to an integrated luminosity L_{text {int}} = 32.2~text {nb}^{-1} and an Electromagnetic Calorimeter triggered data sample with L_{text {int}} = 8.3~mathrm {pb}^{-1}. The p_{mathrm{T}}-integrated text {J}/psi production cross section at midrapidity, computed using the minimum-bias data sample, is text {d}sigma /text {d}y|_{y=0} = 8.97pm 0.24~(text {stat})pm 0.48~(text {syst})pm 0.15~(text {lumi})~mu text {b}. An approximate logarithmic dependence with the collision energy is suggested by these results and available world data, in agreement with model predictions. The integrated and p_{mathrm{T}}-differential measurements are compared with measurements in pp collisions at lower energies and with several recent phenomenological calculations based on the non-relativistic QCD and Color Evaporation models.