Measurement of production and the charm contribution to F2 in deep inelastic scattering at HERA
The ZEUS Collaboration
J. Breitweg - et al.
Received: 30 July 1999 / Published online: 3 November 1999
The production of (2010) mesons in deep inelastic scattering has been measured in the ZEUS detector at HERA using an integrated luminosity of 37pb-1. The decay channels (+c.c.), with or , have been used to identify the D mesons. The e+p cross section for inclusive production with GeV2 and 0.02<y<0.7 is nb in the kinematic region GeV and . Differential cross sections are consistent with a next-to-leading-order perturbative-QCD calculation when using charm-fragmentation models which take into account the interaction of the charm quark with the proton remnant. The observed cross section is extrapolated to the full kinematic region in and in order to determine the charm contribution, , to the proton structure function. The ratio rises from 10% at 1.8GeV2to 30% at 130GeV2 for x values in the range 10-4 to 10-3.
Copyright Springer-Verlag 2000