Measurement of D mesons production in deep inelastic scattering at HERA

Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82pb(-1). Charm has been tagged by reconstructing D*(+), D-0, D+ and D-s(+) (+c.c.) charm mesons. The charm hadrons were measured in the kinematic range p(T)(D*(+), D-0, D+) > 3GeV, p(T)(D-s(+)) > 2GeV and vertical bar eta(D)vertical bar < 1.6 for 1.5 < Q(2) < 1000GeV(2) and 0.02 < y < 0.7. The production cross sections were used to extract charm fragmentation ratios and the fraction of c quarks hadronising in to a particular charm meson in the kinematic range considered. The cross sections were compared to the predictions of next-to-leading-order QCD, and extrapolated to the full kinematic region in p(T)(D) and eta(D) in order to determine the open-charm contribution, F-2(c (c) over bar) ( x,Q(2)), to the proton structure function F-2.