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Inclusive D^* Meson and Associated Dijet Production in Deep Inelastic Scattering |
| Reference |
S Schmidt, presented at DIS03, Spring 2003 |
| Document |
Conference paper
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| Contact |
S Schmidt |
| Abstract |
The inclusive production of D^* 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 7.72 \pm 0.23 (stat.) \pm 1.09 (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^* 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^* meson is found to be 1.63 \pm 0.10 (stat.) \pm 0.25 (syst.) nb. Differential cross sections for dijet events with D^* mesons are also presented and compared to QCD model predictions. Models which provide a good description of inclusive D^* production are found to provide a poorer description of jet production with D^* mesons. |
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