Measurement of the Charm Structure Function of the Photon at LEP

Details Measurement of the Charm Structure Function of the Photon at LEP Measurement of the Charm Structure Function of the Photon at LEP

2001-12-04

arxiv.org/abs/hep-ex/0112006v1

Physics

High Energy Physics

High Energy Physics - Experiment

Presented at Photon 2001

Scientific paper

Charm production is studied in deep-inelastic electron-photon scattering using OPAL data at e+e- centre-of-mass energies from 183 to 209 GeV. Charm quarks are identified by exclusive reconstruction of D* mesons. The cross-section of D* production is measured in a restricted kinematic region, and then extrapolated to the total charm production cross-section and the charm structure function of the photon. For x>0.1 the measurement is well described by Monte Carlo models and perturbative QCD calculations but for x<0.1 the predictions are lower than the data both in the directly measured region and after the extrapolation.

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