Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV

The LHCb collaboration

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed.
Original languageEnglish
Article number167
Number of pages27
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • Charm physics
  • Forward physics
  • Hadron-Hadron scattering (experiments)
  • Particle and resonance production
  • Quarkonium

Cite this

@article{9ea67fb1575446718838bf63ee2544e1,
title = "Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV",
abstract = "Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed.",
keywords = "Charm physics, Forward physics, Hadron-Hadron scattering (experiments), Particle and resonance production, Quarkonium",
author = "Ulrik Egede and {The LHCb collaboration}",
year = "2018",
doi = "10.1007/JHEP10(2018)167",
language = "English",
volume = "2018",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer-Verlag London Ltd.",
number = "10",

}

Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV. / The LHCb collaboration.

In: Journal of High Energy Physics, Vol. 2018, No. 10, 167, 2018.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV

AU - Egede, Ulrik

AU - The LHCb collaboration

PY - 2018

Y1 - 2018

N2 - Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed.

AB - Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed.

KW - Charm physics

KW - Forward physics

KW - Hadron-Hadron scattering (experiments)

KW - Particle and resonance production

KW - Quarkonium

U2 - 10.1007/JHEP10(2018)167

DO - 10.1007/JHEP10(2018)167

M3 - Article

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 10

M1 - 167

ER -