Measurement of the charm structure function F2(c)(gamma) of the photon at LEP
Collaboration
19 pages
Published in:
- Phys.Lett.B 539 (2002) 13-24
e-Print:
- hep-ex/0206021 [hep-ex]
Report number:
- CERN-EP-2002-031
Experiments:
View in:
Citations per year
Abstract: (Elsevier)
The production of charm quarks is studied in deep-inelastic electron–photon scattering using data recorded by the OPAL detector at LEP at nominal e + e − centre-of-mass energies from 183 to 209 GeV. The charm quarks have been identified by full reconstruction of charged D ★ mesons using their decays into D 0 π with the D 0 observed in two decay modes with charged particle final states, K π and K πππ . The cross-section σ D ★ for production of charged D ★ in the reaction e + e − →e + e − D ★ X is measured in a restricted kinematical region using two bins in Bjorken x , 0.0014< x <0.1 and 0.1< x <0.87. From σ D ★ the charm production cross-section σ( e + e − → e + e − c c ̄ X) and the charm structure function of the photon F 2,c γ are determined in the region 0.0014< x <0.87 and 5< Q 2 <100 GeV 2 . For x >0.1 the perturbative QCD calculation at next-to-leading order agrees perfectly with the measured cross-section. For x <0.1 the measured cross-section is 43.8±14.3±6.3±2.8 pb with a next-to-leading order prediction of 17.0 +2.9 −2.3 pb.Note:
- 18 pages, 4 figures
- electron positron: colliding beams
- photon electron: deep inelastic scattering
- quark: charm
- quark: pair production
- photon: structure function
- structure function: charm
- D*(2010): photoproduction
- D*(2010): hadronic decay
- D0: hadronic decay
- quantum chromodynamics: perturbation theory
References(20)
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