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

The Lhcb Collaboration

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48 Scopus citations

## Abstract

Abstract: The production of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of s=13$$\sqrt{s}=13$$ 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/ψ mesons from b-hadron decays is used to extrapolate to a total bb¯$$b\overline{b}$$ cross-section. The ratios of the cross-sections with respect to s=8$$\sqrt{s}=8$$ TeV are also determined.[Figure not available: see fulltext.]

Original language English (US) 172 1-29 29 Journal of High Energy Physics 2015 10 https://doi.org/10.1007/JHEP10(2015)172 Published - Oct 1 2015