Measurement of the relative rate of prompt Χc0, Χc1 and Χc2 production at √s = 7TeV

The LHCb Collaboration

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Prompt production of charmonium Χc0, Χc1 and Χc2 mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of √s = 7TeV. The Χc mesons are identified through their decay to J/Φ,γ with J/Φ → μ+μ- using photons that converted in the detector. A data sample, corresponding to an integrated luminosity of 1.0 fb-1 collected by the LHCb detector, is used to measure the relative prompt production rate of Χc1 and Χc2 in the rapidity range 2:0 < y < 4:5 as a function of the J/Φ transverse momentum from 3 to 20 GeV=c. First evidence for Χc0 meson production at a high-energy hadron collider is also presented.

Original languageEnglish
Article number115
Number of pages20
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 1 Oct 2013
Externally publishedYes


  • Hadron-hadron scattering
  • Quarkonium

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