TTP99-32 Photon Fragmentation in Large-Q^2 ep Collisions at Next-to-Leading Order QCD

TTP99-32 Photon Fragmentation in Large-Q^2 ep Collisions at Next-to-Leading Order QCD

TTP99-32 Photon Fragmentation in Large-Q^2 ep Collisions at Next-to-Leading Order QCD

We study the production of photons accompanied by jets in large-$Q^2$ deep inelastic scattering. Numerical results for the cross section differential with respect to the fraction of momentum $z_{\gamma}$ carried by a photon inside a jet at large $z_{\gamma}, up to $ O(\alpha \alpha_s)$ in perturbative QCD, are presented. The sensitivity to the fragmentation contribution allows one to study the quark-to-photon fragmentation function. Our results can be confronted with future experimental data from HERA.

A. Gehrmann-De Ridder, G. Kramer and H. Spiesberger
Eur. Phys. J. C11 137-144 1999
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