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Inclusive D^* Meson and Associated Dijet Production in Deep Inelastic Scattering |
| Reference |
Final paper expected for EPS'05, Summer 2005 |
| Figures |
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| Contact |
Sebastian Schmidt, Ekaterini Tzamariudaki |
| Abstract |
The inclusive production of D^*\pm mesons in deep inelastic scattering is studied with
the H1 detector at HERA using an integrated luminosity of 47.0 pb^-1. In the kinematic
region 2 < Q^2 < 100 GeV^2 and 0.05 < y < 0.7, an e^+ p cross section for inclusive D^*
meson production of 6.88 \pm 0.20 (stat.) ^{+ 0.64} _{-0.73} (syst.) nb is measured in the visible
range 1.5 < p_t(D*) < 15 GeV and |eta(D*)| < 1.5. Single and double differential inclusive
D^*\pm meson cross sections are compared to perturbative calculations in the framework of the
DGLAP and CCFM evolution schemes. The additional requirement is then made that there are at
least two jets with E_t(jet 1) > 4 GeV, E_t(jet 2) > 3 GeV in the Breit frame of reference
and -1 < eta_lab(jet 1,2) < 2.5. In this kinematic range the inclusive cross section for
dijet production associated with a D^*\pm meson is found to be
1.55 \pm 0.11 (stat.) ^{+ 0.15} _{-0.19} (syst.) nb.
Differential cross sections for dijet events with D^*\pm mesons are also presented and compared
to QCD model predictions. |
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