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HK: Physik der Hadronen und Kerne

HK 17: Electromagnetic and Hadronic Probes II

HK 17.8: Talk

Tuesday, March 9, 2004, 17:45–18:00, B

Observation of inclusive D⁰ and D⁰ production and search for open charm-anticharm pair production at COMPASS — •Nicolas Dedek — CERN, CH-1211 Geneve 23

The COMPASS experiment at CERN investigates the interaction of a polarized muon beam of 160 GeV/c momentum and a polarized nucleon target in order to measure the polarized gluon structure function of the nucleon. The key reaction is the photon gluon fusion into charm anticharm.

First results on the inclusive production of D^*± and D⁰ mesons (via the sequential decay D^*± → D⁰ π, D⁰ → Kπ) have been obtained. The search for associated production of D⁰ Λ_c and D⁰ D⁰ has been started.