Mainz 2004 – wissenschaftliches Programm

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T: Teilchenphysik

T 503: Schwere Quarks IV

T 503.6: Vortrag

Mittwoch, 31. März 2004, 17:40–17:55, HS I

Charm photoproduction with taggers at HERA using ZEUS detector — •Gayane Aghuzumtsyan — Bonn University

Measurements of the production of D^*(2010) mesons in photoproduction using the ZEUS detector at HERA are presented. Electron taggers at 35m and 44m were used to tag D* in different W regions. The D^* mesons are reconstructed from their decay to D⁰ and π⁺ with D⁰ observed in the decay mode K⁻ π⁺. Differential cross-sections of D^* production as a function of the transverse momentum and pseudorapidity of the charm mesons have been measured in the kinematic region p_t(D^*)>1.5 GeV and |η(D^*)|< 1.5. The results are compared with theoretical predictions.