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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/99322
Measurement of J/ψ production in pp collisions at √s = 7 TeV
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The production of J/ψ mesons in proton–proton collisions at √s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/ψ production is measured as a function of the J/ψ transverse
momentum pT and rapidity y in the fiducial region pT ∈ [0; 14] GeV/c and y ∈ [2.0; 4.5]. The differential cross-section and fraction of J/ψ from b-hadron decays are also measured in the same pT and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb−1. The measured cross-sections integrated over the fiducial region are 10.52 ± 0.04 ± 1.40+1.64 −2.20 µb for prompt J/ψ production and 1.14 ± 0.01 ± 0.16 µb for J/ψ from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/ψ production cross-section is obtained assuming no J/ψ polarisation and the third error indicates the acceptance uncertainty due to this assumption.
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CALVO GÓMEZ, Míriam, et al. Measurement of J/ψ production in pp collisions at √s = 7 TeV. European Physical Journal C. 2011. Vol. 71, num. 1645. ISSN 1434-6044. [consulted: 14 of June of 2026]. Available at: https://hdl.handle.net/2445/99322