Diffractive photoproduction of D(2010) at HERA

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Erscheinungsjahr:
2007
Medientyp:
Text
Schlagworte:
  • Physics
  • Physics
Beschreibung:
  • 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{*}(+) -> D-0 pi(+)(s) followed by D-0 -> K- pi(+)(+c.c.). Diffractive events were identi. ed 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 GeV2, in two ranges of the Pomeron fractional momentum x(IP) < 0.035 and x(IP) < 0.01. The relative contribution of di. ractive 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 di. ractive parton distribution functions. The results are consistent with di. ractive QCD factorisation.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/4632bbb5-2430-46ff-a754-e23ff3b5abd2