Berlin 2005 – wissenschaftliches Programm

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T: Teilchenphysik

T 404: Schwere Quarks IV

T 404.5: Vortrag

Montag, 7. März 2005, 17:35–17:50, TU H2033

Charm in charged current deep inelastic scattering with the ZEUS detector at HERA — •Meng Wang — Physikalisches Institut der Universität Bonn, Nußallee 12, 53115 Bonn

A measurement of charm production in charged current (CC) deep inelastic scattering (DIS) has been performed with the ZEUS detector at the HERA collider in Hamburg. The data used are e⁺p collisions collected at center-of-mass energies of 300 and 318 GeV in the years 1995-2000 corresponding to an integrated luminosity of 110 pb⁻¹. The decay channel D^*+ → D⁰π_s⁺ with D⁰ → K⁻π⁺ is used to identify charm production. A handful of candidate events are observed in the presence of combinatorial background. An upper limit is set on the cross section for charm production in CC DIS for Q² > 200 (GeV/c)² and y < 0.9.