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Diffractive photoproduction of D*+-(2010) at HERA

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Chekanov, S. Piotrzkowski, Krzysztof [UCL]

(eng) 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 p_T(D*) > 1.9 GeV and pseudorapidity |eta(D*)| < 1.6, using the decay D*+ -> D0 pi+_s followed by D0 -> K- pi+ (+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 Q^2 < 1 GeV^2, in two ranges of the Pomeron fractional momentum x_pom < 0.035 and x_pom < 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. Comment: LaTeX2e, 29 pages, 9 Postscript figures, 4 tables, minor revisions, accepted for publication in the European Physical Journal C

Document type Article de périodique (Journal article)
Access type Accès libre
Publication date 2007
Journal information "European Physical Journal C. Particles and Fields" - Vol. C51, p. 301-315 (2007)
Peer reviewed yes
e-issn 1434-6052
issn 1434-6044
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
Keywords High Energy Physics - Experiment
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Bibliographic reference Chekanov, S. ; Piotrzkowski, Krzysztof ; et. al. Diffractive photoproduction of D*+-(2010) at HERA. In: European Physical Journal C. Particles and Fields, Vol. C51, p. 301-315 (2007)
Permanent URL http://hdl.handle.net/2078/31098