Inclusive J/$\psi$ production at mid-rapidity in pp collisions at $\sqrt{s}$ = 5.02 TeV

Abstract

Inclusive J/$\psi$ production is studied in minimum-bias proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 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 $p_{\mathrm{T}}$, using a data sample corresponding to an integrated luminosity of $L_{\mathrm{int}}=19.4\pm$ 0.4 nb${}^{-1}$. The measured $p_{\mathrm{T}}$-integrated inclusive J/$\psi$ production cross section is d$\sigma$/d$y$ = 5.64 $\pm$ 0.22 (stat.) $\pm 0.33$ (syst.) $\pm 0.12$ (lumi.) $\mu$b. The $p_{\mathrm{T}}$-differential cross section d${}^2\sigma$/d$p_{\mathrm{T}}$d$y$ is measured in the $p_{\mathrm{T}}$ range 0$-$10 GeV/$c$ and compared with state-of-the-art QCD calculations. The J/$\psi$ $⟨p_{\mathrm{T}}⟩$ and $⟨p_{\mathrm{T}}^2⟩$ are extracted and compared with results obtained at other collision energies.

22 pages, 5 captioned figures, 1 tables, authors from page 17, published version, figures at http://alice-publications.web.cern.ch/node/5286

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