Study of J=ψ Production in Jets

LHCb Collaboration; R Aaij; Marco Adinolfi; Emma Buchanan; Andrew Cook; Jeremy Dalseno; Sam Harnew; James Kariuki; Paras Naik; Konstantinos Petridis; Gabriela Pomery; Eugenia Price; Claire Prouve; Renato Quagliani; Jonas Rademacker; Sophie Richards; Daniel Saunders; Nicola Skidmore; Jaap Velthuis

doi:10.1103/PhysRevLett.118.192001

Study of J=ψ Production in Jets

LHCb Collaboration, R Aaij, Marco Adinolfi, Emma Buchanan, Andrew Cook, Jeremy Dalseno, Sam Harnew, James Kariuki, Paras Naik, Konstantinos Petridis, Gabriela Pomery, Eugenia Price, Claire Prouve, Renato Quagliani, Jonas Rademacker, Sophie Richards, Daniel Saunders, Nicola Skidmore, Jaap Velthuis

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Abstract

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, zðJ=ψÞ ≡ pTðJ=ψÞ=pTðjetÞ, is measured using jets with pTðjetÞ > 20 GeV in the pseudorapidity range 2.5 < ηðjetÞ < 4.0. The observed zðJ=ψÞ 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.

Original language	English
Journal	Physical Review Letters
Volume	118
DOIs	https://doi.org/10.1103/PhysRevLett.118.192001
Publication status	Published - 8 May 2017

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Bristol Consolidated Grant 2015-9
Goldstein, J.
1/10/15 → 31/03/21
Project: Research

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LHCb Collaboration, Aaij, R., Adinolfi, M., Buchanan, E., Cook, A., Dalseno, J., Harnew, S., Kariuki, J., Naik, P., Petridis, K., Pomery, G., Price, E., Prouve, C., Quagliani, R., Rademacker, J., Richards, S., Saunders, D., Skidmore, N., & Velthuis, J. (2017). Study of J=ψ Production in Jets. Physical Review Letters, 118. https://doi.org/10.1103/PhysRevLett.118.192001

@article{775cb21c48744d8aaaaf769da570fc4a,

title = "Study of J=ψ Production in Jets",

abstract = "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{\dh}J=ψ{\TH} ≡ pT{\dh}J=ψ{\TH}=pT{\dh}jet{\TH}, is measured using jets with pT{\dh}jet{\TH} > 20 GeV in the pseudorapidity range 2.5 < η{\dh}jet{\TH} < 4.0. The observed z{\dh}J=ψ{\TH} 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.",

author = "{LHCb Collaboration} and R Aaij and Marco Adinolfi and Emma Buchanan and Andrew Cook and Jeremy Dalseno and Sam Harnew and James Kariuki and Paras Naik and Konstantinos Petridis and Gabriela Pomery and Eugenia Price and Claire Prouve and Renato Quagliani and Jonas Rademacker and Sophie Richards and Daniel Saunders and Nicola Skidmore and Jaap Velthuis",

year = "2017",

month = may,

day = "8",

doi = "10.1103/PhysRevLett.118.192001",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Study of J=ψ Production in Jets

AU - LHCb Collaboration

AU - Aaij, R

AU - Adinolfi, Marco

AU - Buchanan, Emma

AU - Cook, Andrew

AU - Dalseno, Jeremy

AU - Harnew, Sam

AU - Kariuki, James

AU - Naik, Paras

AU - Petridis, Konstantinos

AU - Pomery, Gabriela

AU - Price, Eugenia

AU - Prouve, Claire

AU - Quagliani, Renato

AU - Rademacker, Jonas

AU - Richards, Sophie

AU - Saunders, Daniel

AU - Skidmore, Nicola

AU - Velthuis, Jaap

PY - 2017/5/8

Y1 - 2017/5/8

N2 - 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, zðJ=ψÞ ≡ pTðJ=ψÞ=pTðjetÞ, is measured using jets with pTðjetÞ > 20 GeV in the pseudorapidity range 2.5 < ηðjetÞ < 4.0. The observed zðJ=ψÞ 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.

AB - 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, zðJ=ψÞ ≡ pTðJ=ψÞ=pTðjetÞ, is measured using jets with pTðjetÞ > 20 GeV in the pseudorapidity range 2.5 < ηðjetÞ < 4.0. The observed zðJ=ψÞ 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.

U2 - 10.1103/PhysRevLett.118.192001

DO - 10.1103/PhysRevLett.118.192001

M3 - Article (Academic Journal)

C2 - 28548519

SN - 0031-9007

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Study of J=ψ Production in Jets

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