Measurement of the Charm Production Cross Section in gamma gamma Collisions at LEP
L3 Collaboration
TL;DR
This paper reports the first measurement of the charm production cross section in gamma-gamma collisions at LEP energies, comparing experimental results with next-to-leading order QCD predictions across a range of energies.
Contribution
It provides the first measurement of the charm cross section as a function of two-photon energy in gamma-gamma collisions and compares it with theoretical NLO QCD calculations.
Findings
Measured charm cross section from 5 to 70 GeV two-photon energy.
First experimental data for charm production in this energy range.
Comparison shows agreement or discrepancy with NLO QCD predictions.
Abstract
Open charm production in gamma-gamma 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 sigma(gamma gamma ---> 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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