Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82 pb-1. Charm has been tagged by reconstructing D*+, D0, D+ and Ds+ (+ c.c.) charm mesons. The charm hadrons were measured in the kinematic range pT(D*+, D0, D+) > 3 GeV, pT(Ds+) > 2 GeV and |η(D)| < 1.6 for 1.5 < Q2 < 1000 GeV^2 and 0.02 < y < 0.7. The production cross sections were used to extract charm fragmentation ratios and the fraction of c quarks hadronising into a particular charm meson in the kinematic range considered. The cross sections were compared to the predictions of next-to-leading-order QCD, and extrapolated to the full kinematic region in pT(D) and η(D) in order to determine the open-charm contribution, F2c(x, Q^2), to the proton structure function F2.

Measurement of D mesons production in deep inelastic scattering at HERA.

MONACO, Vincenzo;SACCHI, Roberto;SOLANO, Ada Maria;
2007-01-01

Abstract

Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82 pb-1. Charm has been tagged by reconstructing D*+, D0, D+ and Ds+ (+ c.c.) charm mesons. The charm hadrons were measured in the kinematic range pT(D*+, D0, D+) > 3 GeV, pT(Ds+) > 2 GeV and |η(D)| < 1.6 for 1.5 < Q2 < 1000 GeV^2 and 0.02 < y < 0.7. The production cross sections were used to extract charm fragmentation ratios and the fraction of c quarks hadronising into a particular charm meson in the kinematic range considered. The cross sections were compared to the predictions of next-to-leading-order QCD, and extrapolated to the full kinematic region in pT(D) and η(D) in order to determine the open-charm contribution, F2c(x, Q^2), to the proton structure function F2.
2007
074
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http://dx.doi.org/10.1088/1126-6708/2007/07/074
High Energy Physics; HERA; ZEUS Collaboration
S. Chekanov;M. Derrick;S. Magill;B. Musgrave;D. Nicholass;J. Repond;R. Yoshida;M. C. K.;M. Jechow;N. Pavel;A. G. Y.;S. Antonelli;P. Antonioli;G. Bari;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/47323
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