ZU-TH-19-09
IPPP-09-94
DCPT-09-188
HD-THEP-09-28
MCNET-09-18
arXiv:0912.3501
Phys.Rev. D81 (2010) 034026

by: Hoeche, Stefan (Zurich U.) et al.

Abstract:
We present a Monte-Carlo approach to prompt-photon production, where photons and QCD partons are treated democratically. The photon fragmentation function is modelled by an interleaved QCD+QED parton shower. This known technique is improved by including higher-order real-emission matrix elements. To this end, we extend a recently proposed algorithm for merging matrix elements and truncated parton showers. We exemplify the quality of the Monte-Carlo predictions by comparing them to measurements of the photon fragmentation function at LEP and to measurements of prompt photon and diphoton production from the Tevatron experiments.