Measurement of the charm production cross section in γγ collisions at LEP
2001
Abstract Open charm production in γγ collisions is studied with data collected at e + e − centre-of-mass energies from 189 GeV to 202 GeV corresponding to a total integrated luminosity of 410 pb −1 . The charm cross section σ(γγ→ c c X ) is measured for the first time as a function of the two-photon centre-of-mass energy in the interval from 5 GeV to 70 GeV and is compared to NLO QCD calculations.
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