Study of J/ψ Production in Jets - INSPIRE

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Study of J/ψ Production in Jets

LHCb

Collaboration

Jan 18, 2017

11 pages

Published in:

Phys.Rev.Lett. 118 (2017) 19, 192001

Published: May 8, 2017

e-Print:

1701.05116 [hep-ex]

DOI:

10.1103/PhysRevLett.118.192001

Report number:

LHCB-PAPER-2016-064,
CERN-EP-2017-006

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

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.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-064.html; v2 updated to journal version

p p: colliding beams
J/psi(3100): hadroproduction
jet: transverse momentum
quantum chromodynamics: nonrelativistic
p p: scattering
jet: rapidity
LHC-B
CERN LHC Coll
experimental results
13000 GeV-cms

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