Using e+e-→Ds*-Ds+ data collected near the peak Ds production energy, Ecm=4170MeV, with the CLEO-c detector, we present the first observation of the decay Ds+→p nmacr . We measure a branching fraction B(Ds+→p nmacr )=(1.30±0.36-0.16+0.12)×10-3. This is the first observation of a charmed meson decaying into a baryon-antibaryon final state.
Physical Review Letters
- Pub Date:
- May 2008
- Decays of charmed mesons;
- High Energy Physics - Experiment
- 7 pages, available through http://www.lns.cornell.edu/public/CLNS/, submitted to PRL Small changes following referee's suggestions