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Other literature type . 2020

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Study Of J/Psi Meson Production Inside Jets In Pp Collisions At N Root S=8 Tev The Cm Collaboration

Name: Study Of J/Psi Meson Production Inside Jets In Pp Collisions At N Root S=8 Tev The Cm Collaboration
Keywords: 7. Clean energy

descriptionPublicationkeyboard_double_arrow_right Other literature type 01 Jan 2020Publisher:Aperta

Authors: Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; +14 Authors

Study Of J/Psi Meson Production Inside Jets In Pp Collisions At N Root S=8 Tev The Cm Collaboration

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Abstract

A study of the production of prompt J/psi mesons contained in jets in proton-proton collisions at root s = 8 TeV is presented. The analysis is based on data corresponding to an integrated luminosity of 19.1 fb(-1) collected with the CMS detector at the LHC. For events with at least one observed jet, the angular separation between the J/psi meson and the jet is used to test whether the J/psi meson is part of the jet. The analysis shows that most prompt J/psi mesons having energy above 15 GeV and rapidity vertical bar y vertical bar < 1 are contained in jets with pseudorapidity vertical bar eta(jet)vertical bar < 1. The differential distributions of the probability to have a J/psi meson contained in a jet as a function of jet energy for a fixed J/psi energy fraction are compared to a theoretical model using the fragmenting jet function approach. The data agree best with fragmenting jet function calculations that use a long-distance matrix element parameter set in which prompt J/psi mesons are predicted to be unpolarized. This technique demonstrates a new way to test predictions for prompt J/psi production using nonrelativistic quantum chromodynamics. (C) 2020 Elsevier B.V.

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Study of J/ψ meson production inside jets in pp collisions at s=8TeV
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