Measurement of $J/ψ$ production in $pp$ collisions at $√s=2.76$ TeV

R. Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, D. Martinez-Santos, M.H.M. Merk, H.G. Raven, M. Schiller, V. Syropoulos, S. Tolk, Collaboration LHCb

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The production of J/ψ mesons is studied with the LHCb detector using data from pp collisions at √s = 2:76TeV corresponding to an integrated luminosity of 71 nb−1. The differential cross-section for inclusive J/ψ production is measured as a function of its transverse momentum p<inf>T</inf>. The cross-section in the fiducial region 0 < p<inf>T</inf> < 12 GeV=c and rapidity 2.0 < y < 4.5 is measured to be 5.6 ± 0:1 (stat) ± 0.4 (syst) μb, with the assumption of unpolarised J/ψ production. The fraction of J/ψ production from b-hadron decays is measured to be (7.1 ± 0.6 (stat) ± 0.7 (syst))%.
Original languageEnglish
JournalJournal of High Energy Physics
Issue number2
Publication statusPublished - 2013

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