Measurement of the relative rate of prompt chi(c0,) chi(c1) and chi(c2) production at root s=7 TeV

LHCb collaboration

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Abstract

Prompt production of charmonium chi(c0), chi(c1) and chi(c2) mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identi fi ed through their decay to J/psi gamma, with J/psi -> mu(+)mu(-) 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 chi(c1) and chi(c2) in the rapidity range 2.0 < y < 4.5 as a function of the J/psi transverse momentum from 3 to 20 GeV/c. First evidence for chi(c0) 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
DOIs
Publication statusPublished - 18 Oct 2013
Externally publishedYes

Keywords

  • Quarkonium
  • Hadron-Hadron Scattering
  • DECAY
  • PSI

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