Experimental limits on weak annihilation contributions to b -> ul nu decays

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Issue Date
2006-03Author
Besson, David Zeke
Publisher
AMERICAN PHYSICAL SOC
Type
Article
Published Version
http://publish.aps.org/Metadata
Show full item recordAbstract
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 vertical bar V(ub)vertical bar from inclusive measurements of B -> X(u)l nu. Using a wide range of models based on available theoretical input we set a limit of Gamma(WA)/Gamma(b -> u)< 7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of vertical bar V(ub)vertical bar.
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Citation
Rosner, JL, Adam, NE, et al. Experimental limits on weak annihilation contributions to b -> ul nu decays. PHYSICAL REVIEW LETTERS. March 2006. 96(12)
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