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Title: Study of J / ψ Production in Jets

Journal Article · · Physical Review Letters
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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, $$z$$($J/ψ$)≡$$p$$T($J/ψ$)/$$p$$T(jet), is measured using jets with $$p$$T(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 $$p$$T fraction carried by prompt $J/ψ$ mesons in jets at any experiment.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
LHCb Collaboration
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1525216
Journal Information:
Physical Review Letters, Vol. 118, Issue 19; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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