2026-04-17T04:09:09Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1327372025-12-04T21:32:49Zcom_2072_1057col_2072_478812col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Badalov, Alexey author Calvo Gómez, Míriam author Camboni, Alessandro author Coquereau, Samuel author Fernandez, G. author Garrido Beltrán, Lluís author Gascón Fora, David author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Rives Molina, Vicente José author Sánchez Gonzalo, David author Vilasis-Cardona, Xavier author LHCb Collaboration author 2019-05-06T12:17:58Z 2019-05-06T12:17:58Z 2017-05-08 2019-05-06T12:18:23Z The production of J /ψ mesons in jets is studied in the forward region of proton-proton collisions using data collected with the LHCb detector at a center-of-mass energy of 13 TeV. The fraction of the jet transverse momentum carried by the J /ψ meson, z (J /ψ ) ≡pT(J /ψ )/pT(jet ) , is measured using jets with pT(jet )>20 GeV in the pseudorapidity range 2.5 <η (jet )<4.0 . The observed z (J /ψ ) distribution for J /ψ mesons produced in b -hadron decays is consistent with expectations. However, the results for prompt J /ψ production do not agree with predictions based on fixed-order nonrelativistic QCD. This is the first measurement of the pT fraction carried by prompt J /ψ mesons in jets at any experiment. Física de partícules Experiments Particle physics Experiments Study of J/ψ Production in Jets