FIZIKA B 17 (2008) 1, 77 - 84

 size 289 kB



Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
(On behalf of the H1 and ZEUS collaborations)

Received 24 October 2007;        Accepted 20 February 2008
Online 18 June 2008

Recent measurements of the charm and beauty production in ep collisions at HERA are presented. Heavy-quark tagging methods used by the ZEUS and H1 experiments are described. Cross section results are compared with NLO QCD predictions and in general the data are well described by the calculations. A determination of the charm and beauty contributions to the proton structure function is also presented. The comparison with NLO QCD predictions shows reasonable agreement. A comparison of the result on the beauty contribution to the structure function with a NNLO calculation is also shown, although the errors are currently too large to discriminate between theories.

PACS numbers: 13.60.Le, 13.60.-r
UDC 539.126

Keywords: HERA, ep collisions, charm and beauty, cross sections, proton structure function, NLO QCD predictions

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