Inclusive J/psi production is studied in minimum-bias proton-proton collisions at a centre-of-mass energy of root s = 5.02 TeV by ALICE at the CERN LHC. The measurement is performed at mid-rapidity (vertical bar y vertical bar < 0.9) in the dielectron decay channel down to zero transverse momentum p(T), using a data sample corresponding to an integrated luminosity of L-int = 19.4 +/- 0.4 nb(-1). The measured p(T)-integrated inclusive J/psi production cross sec- tion is d sigma/dy = 5.64 +/- 0.22(stat.) +/- 0.33(syst.) +/- 0.12(lumi.) mu b. The p(T)-differential cross section d(2)sigma/dp(T)dy is measured in the p(T) range 0-10 GeV/c and compared with state-of-the-art QCD calculations. The J/psi < p(T)> and < p(T)(2)> are extracted and compared with results obtained at other collision energies.
Inclusive J/ψ production at mid-rapidity in pp collisions at √s = 5.02 TeV
Chauvin, A.;De Falco, A.;Fionda, F. M.;Paul, B.;Usai, G. L.;
2019-01-01
Abstract
Inclusive J/psi production is studied in minimum-bias proton-proton collisions at a centre-of-mass energy of root s = 5.02 TeV by ALICE at the CERN LHC. The measurement is performed at mid-rapidity (vertical bar y vertical bar < 0.9) in the dielectron decay channel down to zero transverse momentum p(T), using a data sample corresponding to an integrated luminosity of L-int = 19.4 +/- 0.4 nb(-1). The measured p(T)-integrated inclusive J/psi production cross sec- tion is d sigma/dy = 5.64 +/- 0.22(stat.) +/- 0.33(syst.) +/- 0.12(lumi.) mu b. The p(T)-differential cross section d(2)sigma/dp(T)dy is measured in the p(T) range 0-10 GeV/c and compared with state-of-the-art QCD calculations. The J/psi < p(T)> and < p(T)(2)> are extracted and compared with results obtained at other collision energies.
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