Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf..620l&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
Measurements of charm production in deep inelastic scattering (DIS) and photoproduction have been carried out by the ZEUS and H1 collaborations at HERA. Protons at 920 GeV are collided with positrons of 27.5 GeV. Results using integrated luminosities up to 120 pb-1 for HERA I and 35 pb-1 for HERA II are presented. Single and double differential cross sections are compared to perturbative QCD (pQCD) predictions. Charm DIS cross sections are in reasonable agreement with pQCD calculations. There is evidence that charm fragmentation is universal in e+e- and ep. First results from HERA II data on charm and beauty production are presented.
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