Eur. Phys. J. C 22, 303-315 (2001)
DOI: 10.1007/s100520100797

Is a large intrinsic k_T needed to describe photon + jet photoproduction at HERA?

M. Fontannaz¹, J.Ph. Guillet² and G. Heinrich<sup>1

1</sup>  Laboratoire de Physique Théorique LPT (Unité Mixte de Recherche 8627 du CNRS) , Université de Paris XI, Bâtiment 210, 91405 Orsay, France
²  Laboratoire d'Annecy-Le-Vieux de Physique Théorique LAPTH (Unité Mixte de Recherche 5108 du CNRS, associée à l'Université de Savoie) , Chemin de Bellevue, B.P. 110, 74941 Annecy-le-Vieux, France

(Received: 1 August 2001 / Revised version: 18 September 2001 / Published online: 21 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
We study the photoproduction of an isolated photon and a jet based on a code of partonic event generator type which includes the full set of next-to-leading order corrections. We compare our results to a recent ZEUS analysis in which an effective k_T of the incoming partons has been determined. We find that no additional intrinsic k_T is needed to describe the data.

© Società Italiana di Fisica, Springer-Verlag 2001