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

Abstract

We report on the inclusive J/$\psi$ production cross section measured at the CERN Large Hadron Collider in proton-proton collisions at a centre-of-mass energy $\sqrt{s}=13$ TeV. The J/$\psi$ mesons are reconstructed in the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ 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 J/$\psi$ production cross section at midrapidity, computed using the minimum-bias data sample, is $\text{d}\sigma /\text{d}y{|}_{y=0}=8.97\pm 0.24(\text{stat})\pm 0.48(\text{syst})\pm 0.15(\text{lumi})\mu \text{b}$. 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.

25 pages, 4 captioned figures, 1 table, authors from page 19, published version, figures at http://alice-publications.web.cern.ch/node/7300

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