Measurement of J/ψ production cross-sections in pp collisions at s√ = 5 TeV
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellán Beteta, C.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Afsharnia, H.
Agapopoulou, C.
Aidala, C. A.
Aiola, S.
Date Issued
November 24, 2021
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2021 Nov 24;2021(11):181
Version
Final published version
Abstract
The production cross-sections of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of s√ = 5 TeV are measured using a data sample corresponding to an integrated luminosity of 9.13 ± 0.18 pb−1, collected by the LHCb experiment. The cross-sections are measured differentially as a function of transverse momentum, pT, and rapidity, y, and separately for J/ψ mesons produced promptly and from beauty hadron decays (nonprompt). With the assumption of unpolarised J/ψ mesons, the production cross-sections integrated over the kinematic range 0 < pT < 20 GeV/c and 2.0 < y < 4.5 are
σprompt J/ψ=8.154±0.010±0.283 μb,σnonprompt J/ψ=0.820±0.003±0.034 μb,
where the first uncertainties are statistical and the second systematic. These cross-sections are compared with those at s√ = 8 TeV and 13 TeV, and are used to update the measurement of the nuclear modification factor in proton-lead collisions for J/ψ mesons at a centre-of-mass energy per nucleon pair of sNN−−−√ = 5 TeV. The results are compared with theoretical predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP11(2021)181
