Dijet angular distributions in photoproduction of charm at HERA

Journal article

Dijet angular distributions of photoproduction events in which a D*± meson is produced in association with one of two energetic jets have been measured with the ZEUS detector at HERA, using an integrated luminosity of 120 pb-1. Differential cross sections as a function of the angle between the charm-jet and the proton-beam direction in the dijet rest frame have been measured for samples enriched in direct or resolved photon events. The results are compared with predictions from leading-order parton-shower Monte Carlo models and with next-to-leading-order QCD calculations. The angular distributions show clear evidence for the existence of charm originating from the photon. © 2003 Published by Elsevier B.V.

Authors: Chekanov, S; Derrick, M; Krakauer, D; Loizides, J; Magill, S

• Publication status: Published
• Journal: Physics Letters B
• Volume: 565
• Issue: 1-4
• Pages: 87-101
• Publication date: 2003-07-17
• DOI: 10.1016/S0370-2693(03)00752-4
• ISSN: 0370-2693
• Language: English