Measurement of forward J/ψ production cross-sections in pp collisions at √s = 13 TeV

The LHCb Collaboration

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The production of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of √ s = 13 TeV is studied with the LHCb detector. Cross-section measurements are performed as a function of the transverse momentum pT and the rapidity y of the J/ψ meson in the region pT < 14 GeV/c and 2.0 < y < 4.5, for both prompt J/ψ mesons and J/ψ mesons from b-hadron decays. The production cross-sections integrated over the kinematic coverage are 15.30 ± 0.03 ± 0.86 µb for prompt J/ψ and 2.34 ± 0.01 ± 0.13 µb for J/ψ from b-hadron decays, assuming zero polarization of the J/ψ meson. The first uncertainties are statistical and the second systematic. The cross-section reported for J/ψmesons from b-hadron decays is used to extrapolate to a total b¯b cross-section. The ratiosof the cross-sections with respect to √s = 8 TeV are also determined.
Original languageEnglish
Article number172
Pages (from-to)1-29
Number of pages29
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 2015
Externally publishedYes


  • Hadron-Hadron Scattering

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