Measurement of D^{+} and Lambda_{c}^{+} production in deep inelastic scattering at HERA

Details Measurement of D^{+} and Lambda_{c}^{+} production in deep inelastic scattering at HERA Measurement of D^{+} and Lambda_{c}^{+} production in deep inelastic scattering at HERA

2010-07-12

arxiv.org/abs/1007.1945v2

JHEP 1011:009,2010

Physics

High Energy Physics

High Energy Physics - Experiment

Minor changes to the text in response to the JHEP referee

Scientific paper

10.1007/JHEP11(2010)009

Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 120 pb^{-1}. The hadronic decay channels D^{+} -> K^{0}_{S} pi^{+}, Lambda_{c}^{+} -> p K^{0}_{S} and Lambda_{c}^{+} -> Lambda pi^{+}, and their charge conjugates, were reconstructed. The presence of a neutral strange hadron in the final state reduces the combinatorial background and extends the measured sensitivity into the low transverse momentum region. The kinematic range is 0 < p_{T}(D^{+}, Lambda_{c}^{+}) < 10 GeV, |eta(D^{+}, Lambda_{c}^{+})| < 1.6, 1.5 < Q^{2} < 1000 GeV^{2} and 0.02 < y < 0.7. Inclusive and differential cross sections for the production of D^{+} mesons are compared to next-to-leading-order QCD predictions. The fraction of c quarks hadronising into Lambda_{c}^{+} baryons is extracted.

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