Experimental Limits on Weak Annihilation Contributions to bulν Decays

J. L. Rosner et al. (CLEO Collaboration)
Phys. Rev. Lett. 96, 121801 – Published 28 March 2006

Abstract

We present the first experimental limits on high-q2 contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of |Vub| from inclusive measurements of BXulν. Using a wide range of models based on available theoretical input we set a limit of ΓWA/Γbu<7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of |Vub|.

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  • Received 10 January 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.121801

©2006 American Physical Society

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Vol. 96, Iss. 12 — 31 March 2006

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