Diffractive photoproduction of D*±(2010) at HERA

Journal article

Diffractive photoproduction of D*±(2010) mesons was measured with the ZEUS detector at the ep collider HERA, using an integrated luminosity of 78.6 pb-1. The D* mesons were reconstructed in the kinematic range: transverse momentum pT(D*) > 1.9 GeV and pseudorapidity |η(D*)|<1.6, using the decay D*+→D0π+s followed by D0→K-π+(+c.c.). Diffractive events were identified by a large gap in pseudorapidity between the produced hadronic state and the outgoing proton. Cross sections are reported for photon-proton centre-of-mass energies in the range 130 < W < 300 GeV and for photon virtualities Q2 < 1 GeV2, in two ranges of the Pomeron fractional momentum xIP<0.035 and xIP<0.01. The relative contribution of diffractive events to the inclusive D*±(2010) photoproduction cross section is about 6%. The data are in agreement with perturbative QCD calculations based on various parameterisations of diffractive parton distribution functions. The results are consistent with diffractive QCD factorisation. © Springer-Verlag Berlin Heidelberg 2007.

Authors: Chekanov, S; Derrick, M; Magill, S; Musgrave, B; Nicholass, D

• Journal: European Physical Journal C
• Volume: 51
• Issue: 2
• Pages: 301-315
• Publication date: 2007-07-01
• DOI: 10.1140/epjc/s10052-007-0326-3
• EISSN: 1434-6052
• ISSN: 1434-6044
• Language: English