First Observation of the Decays B0 --> D*-pp¯π+ and B0 --> D*-pn¯
Abstract
We report the first observation of exclusive decays of the type B-->D*NN¯X, where N is a nucleon. Using a sample of 9.7×106BB¯ pairs collected with the CLEO detector operating at the Cornell Electron Storage Ring, we measure the branching fractions B\(B0-->D*-pp¯π+\) = \(6.5+1.3-1.2+/-1.0\)×10-4 and B\(B0-->D*-pn¯\) = \(14.5+3.4-3.0+/-2.7\)×10-4. Antineutrons are identified by their annihilation in the CsI electromagnetic calorimeter.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevLett.86.2732
- arXiv:
- arXiv:hep-ex/0009011
- Bibcode:
- 2001PhRvL..86.2732A
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 9 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS