The CMS Collaboration;
(2020)
Study of J/ψ meson production inside jets in pp collisions at √s = 8 TeV.
Physics Letters B
, 804
, Article 135409. 10.1016/j.physletb.2020.135409.
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Abstract
A study of the production of prompt J/ψ mesons contained in jets in proton-proton collisions at √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/ψ meson and the jet is used to test whether the J/ψ meson is part of the jet. The analysis shows that most prompt J/ψ mesons having energy above 15 GeV and rapidity |y| < 1 are contained in jets with pseudorapidity |ηjet| < 1. The differential distributions of the probability to have a J/ψ meson contained in a jet as a function of jet energy for a fixed J/ψ 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/ψ mesons are predicted to be unpolarized. This technique demonstrates a new way to test predictions for prompt J/ψ production using nonrelativistic quantum chromodynamics.
Type: | Article |
---|---|
Title: | Study of J/ψ meson production inside jets in pp collisions at √s = 8 TeV |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1016/j.physletb.2020.135409 |
Publisher version: | https://doi.org/10.1016/j.physletb.2020.135409 |
Language: | English |
Additional information: | Copyright © 2020 Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. |
Keywords: | CMS, J/psi Mesons, Jets |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10097476 |
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