Flavor-Specific Inclusive B Decays to Charm

Creators: Coan, T. E.; Barish, B.; Chadha, M.; Chan, S.; Eigen, G.; Miller, J. S.; O'Grady, C.; Schmidtler, M.; Urheim, J.; Würthwein, F.; Weinstein, Alan J.; CLEO Collaboration

Abstract

We have measured the branching fractions for B → D̅ X, B → DX, and B → D̅ Xℓ^+ν. From these results and some previously measured branching fractions, we obtain B(b → cc̅ s) = (21.9±3.7)%, B(b → sg)<6.8% at 90% C.L., and B(D^0 → K^-π^+) = (3.69±0.20)%. Implications for the "B semileptonic decay problem" (measured branching fraction being below theoretical expectations) are discussed. With the increase in the value of B(b → cc̅ s) due to B → DX, the discrepancy is no longer statistically compelling.

Additional Information

© 1998 The American Physical Society. Received 23 October 1997; published in the issue dated 9 February 1998. We thank Isard Dunietz for informative conversations. We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. This work was supported by the National Science Foundation, the U.S. Department of Energy, the Heisenberg Foundation, the Alexander von Humboldt Stiftung, Research Corporation, the Natural Sciences and Engineering Research Council of Canada, the A. P. Sloan Foundation, the Swiss National Science Foundation, and the Yonsei University Faculty Research Fund.

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