Scientific article
English

Inclusive charm production in two photon collisions at LEP

ContributorsL3 Collab.
Published inPhysics letters. B, vol. 453, no. 1-2, p. 83-93
Publication date1999
Abstract

The cross section of charm production in γγ collisions σ(e + e − →e + e − c c ̄ X) is measured at LEP with the L3 detector at centre-of-mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semileptonic decays. The direct process γγ→c c ̄ is found to be insufficient to describe the data. The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon.

Keywords
  • Electron positron: colliding beams
  • Exchange: two-photon
  • Photon photon: inclusive reaction
  • Quark: charm
  • Quark: pair production
  • Charmed particle: semileptonic decay
  • Lepton: transverse momentum
  • Photon: resolved
  • Gluon: momentum spectrum
  • Channel cross section: energy dependence
  • Differential cross section: transverse momentum
  • Energy flow: rapidity dependence
  • L3
  • Experimental results
  • CERN LEP Stor
  • 91-183 GeV-cms
Citation (ISO format)
L3 Collab. Inclusive charm production in two photon collisions at LEP. In: Physics letters. B, 1999, vol. 453, n° 1-2, p. 83–93. doi: 10.1016/s0370-2693(99)00274-9
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Journal ISSN0370-2693
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