Karel Cerny (Charles University in Prague)
Measurements of open charm production are presented in diffractive deep inelastic scattering (5 < Q2 < 100 GeV2), based on HERA data recorded at √s = 319 GeV with an integrated luminosity of 281 pb-1. The event topology is given by ep → eXY, where the system X, containing at least one D(2010) meson, is separated from a leading low-mass proton dissociative system Y by a large rapidity gap. The D candidates are reconstructed fully in the D*+ → D0 π+ → (K- π+) π+ (+C.C.) decay channel. The measured differential cross sections are compared at the level of stable hadrons with next-to-leading order QCD predictions obtained in the massive scheme, where the charm quark is produced via the boson-gluon fusion, using diffractive parton densities previously obtained by H1 from fits of the inclusive diffractive cross sections.
Dr Collaboration H1 (DESY)