Published March 31, 2006
| Published
Journal Article
Open
Experimental Limits on Weak Annihilation Contributions to b → ulv Decays
Chicago
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Abstract
We present the first experimental limits on high-q^2 contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of |V_(ub)| from inclusive measurements of B→X_ulν. Using a wide range of models based on available theoretical input we set a limit of Γ_(WA)/Γ_(b→u) <7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of |V_(ub)|.
Additional Information
© 2006 The American Physical Society. Received 10 January 2006; published 28 March 2006. We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. We thank G. Paz, Z. Ligeti, M. Luke, and M. Neubert for helpful discussions. This work was supported by the A. P. Sloan Foundation, the National Science Foundation, and the U.S. Department of Energy.Attached Files
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Additional details
- Eprint ID
- 24597
- Resolver ID
- CaltechAUTHORS:20110729-102252420
- A. P. Sloan Foundation
- NSF
- Department of Energy (DOE)
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2011-08-01Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field