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Charm Production in Deep-Inelastic $eγ$ Scattering To Next-To-Leading Order in QCD

E. Laenen·S. Riemersma
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Abstract

We discuss the calculation of $F_2^γ({\rm charm})$ to next-to-leading order (NLO) in QCD, including contributions from both hadronlike and pointlike photons. We show that the former dominates strongly below $x\simeq 0.01$, and the latter above this value. This fact makes $F_2^γ({\rm charm})$ for $x \geq 0.01$ calculable, whereas for $x \leq 0.01$ it serves to constrain the small-$x$ gluon density in the photon. Both ranges in $x$ are accessible at LEP2. Theoretical uncertainties are well under control. We present rates for single-tag events for the process for $e^+e^- \rightarrow e^+e^- c X$ for LEP2. Although these event rates are small, we believe a measurement of $F_2^γ({\rm charm})$ is feasible.

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E. Laenen, S. Riemersma. 1995-05-04. Charm Production in Deep-Inelastic $eγ$ Scattering To Next-To-Leading Order in QCD. https://arxiv.org/abs/hep-ph/9505230

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