Naslov
Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at √s = 5.02 and 13 TeV

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Journal of High Energy Physics (1029-8479) 2022 (2022), 3; 190, 35

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hadron-Hadron Scattering ; J/psi(3100): production ; p p: scattering ; quantum chromodynamics: perturbation theory ; ALICE ; differential cross section ; transverse momentum ; LHC-B ; rapidity ; CERN LHC Coll ; phase space ; experimental results ; 5020: 13000 GeV-cms/nucleon

Sažetak
The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at √s = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of L int= 19.4 ± 0.4 nb^{; ; ; −1}; ; ; −1 and Lint = 32.2 ± 0.5 nb^{; ; ; −1}; ; ; −1 at √s = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at √s = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the \mathrm{; ; ; b}; ; ; \overline{; ; ; \mathrm{; ; ; b}; ; ; }; ; ; b b pair cross section at midrapidity and in the total phase space. The total \mathrm{; ; ; b}; ; ; \overline{; ; ; \mathrm{; ; ; b}; ; ; }; ; ; b b cross sections are found to be σbb = 541 ± 45 (stat.) ± 69 (syst.)+10−12 (extr.) μb and σbb = 218±37 (stat.)±31 (syst.)+8.2−9.1 (extr.) μb at √s = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at √s = 13 TeV is also provided.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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