TY - JOUR
T1 - Measurement of J/ψ production cross-sections in pp collisions at √s = 5 TeV
AU - LHCb Collaboration
AU - Aaij, R.
AU - Abdelmotteleb, A. S.W.
AU - Abellán Beteta, C.
AU - Ackernley, T.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Afsharnia, H.
AU - Agapopoulou, C.
AU - Aidala, C. A.
AU - Aiola, S.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Aliouche, Z.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Amato, S.
AU - Amey, J. L.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreianov, A.
AU - Andreotti, M.
AU - Archilli, F.
AU - Artamonov, A.
AU - Artuso, M.
AU - Arzymatov, K.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Audurier, B.
AU - Bachmann, S.
AU - Bachmayer, M.
AU - Back, J. J.
AU - Baladron Rodriguez, P.
AU - Bifani, S.
AU - Calladine, R.
AU - Chatzikonstantinidis, G.
AU - Cooke, N.
AU - Duk, V.
AU - Ilten, P.
AU - Plews, J.
AU - Popov, D.
AU - Sergi, A.
AU - Slater, M. W.
AU - Swallow, P. N.
AU - Thompson, D. J.D.
AU - Watson, N. K.
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/11/24
Y1 - 2021/11/24
N2 - 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 areσpromptJ/ψ=8.154±0.010±0.283μb,σnonpromptJ/ψ=0.820±0.003±0.034μb, 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.
AB - 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 areσpromptJ/ψ=8.154±0.010±0.283μb,σnonpromptJ/ψ=0.820±0.003±0.034μb, 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.
KW - Hadron-Hadron scattering (experiments)
KW - Heavy quark production
KW - QCD
KW - Quarkonium
UR - http://www.scopus.com/inward/record.url?scp=85120579287&partnerID=8YFLogxK
U2 - 10.1007/JHEP11(2021)181
DO - 10.1007/JHEP11(2021)181
M3 - Article
AN - SCOPUS:85120579287
SN - 1126-6708
VL - 2021
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 11
M1 - 181
ER -