https://doi.org/10.1140/epjc/s10052-011-1616-3
Regular Article - Theoretical Physics
NLO calculation of prompt photon production in DIS at HERA
1
LAPTH, Université de Savoie, CNRS, BP 110, Chemin de Bellevue, 74941, Annecy-le-Vieux Cedex, France
2
The Institute of Mathematical Sciences, Chennai, 600 113, India
3
Laboratoire de Physique Théorique, UMR 8627 du CNRS, Université Paris XI, Bâtiment 210, 91405, Orsay Cedex, France
* e-mail: aurenche@lapp.in2p3.fr
Received:
6
January
2011
Published online:
9
April
2011
We present a next-to-leading order calculation of prompt photon production in deep-inelastic scattering. The calculation involves direct, fragmentation and resolved contributions. Inclusive as well as isolated photon production cross sections are presented. The relevance of imposing a transverse momentum cut-off in the virtual-photon proton center-of-mass system rather than in the laboratory frame is discussed. Whenever possible, a comparison of the theoretical results with recent HERA data is carried out.
© Springer-Verlag / Società Italiana di Fisica, 2011
