%0 Journal Article
%T Measurement of J/psi production cross-sections in pp collisions at root s=5 TeV
%A LHCb Collaboration (Aaij, R. et al
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Journal of High Energy Physics
%D 2021
%V 11
%N 11
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2021
%O WOS:000723655700003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5037), last updated on Thu, 09 Dec 2021 10:54:17 +0000
%X The production cross-sections of J/psi mesons in proton-proton collisions at a centre-of-mass energy of root s = 5TeV 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, p(T), and rapidity, y, and separately for J/psi mesons produced promptly and from beauty hadron decays (nonprompt). With the assumption of unpolarised J/psi mesons, the production cross-sections integrated over the kinematic range 0 < p(T) < 20 GeV/c and 2.0 < y < 4.5 are sigma(prompt) J/psi = 8.154 +/- 0.010 +/- 0.283 μb, sigma(nonprompt) J/psi = 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 root s = 8TeV and 13TeV, and are used to update the measurement of the nuclear modification factor in proton-lead collisions for J/psi mesons at a centre-of-mass energy per nucleon pair of root s(NN) = 5TeV. The results are compared with theoretical predictions.
%K Hadron-Hadron scattering (experiments)
%K Heavy quark production
%K QCD
%K Quarkonium
%R 10.1007/JHEP11(2021)181
%U https://arxiv.org/abs/2109.00220
%U https://doi.org/10.1007/JHEP11(2021)181
%P 181-32pp