Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 28: QCD III

T 28.8: Group Report

Wednesday, March 30, 2011, 18:30–18:50, 30.33: 001

Measurement of beauty and charm production in deep inelastic scattering with the ZEUS detector at HERA — Ian C. Brock¹, •Ramoona Shehzadi¹, Markus Juengst¹, Philipp Roloff², and Vladyslav Libov² — ¹Physikalisches institut, University of Bonn — ²DESY and University of Hamburg

The study of heavy flavour production in ep collisions is one of the main research topics at HERA. In two recent analyses the production of heavy quarks in deep inelastic scattering has been studied with the ZEUS detector using the full HERA II dataset. In one of these analyses, the heavy flavour events were identified using electrons from semileptonic decays. The fractions of events containing the heavy quarks were extracted from a likelihood fit using variables sensitive to electron identification as well as to semileptonic decays. In the second analysis, the heavy flavour content in events with a jet was extracted using the decay length significance and invariant mass of the secondary vertices. Total and differential cross sections were measured and compared with next-to-leading-order QCD calculations and Monte Carlo models. The beauty and charm contributions to the proton structure function F₂, were extracted from the double-differential cross sections.