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Experimental limits on weak annihilation contributions to b -> ul nu decays
Besson, David Zeke
Besson, David Zeke
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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 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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2006-03
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AMERICAN PHYSICAL SOC
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GetPDFServlet17.pdf
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Rosner, JL, Adam, NE, et al. Experimental limits on weak annihilation contributions to b -> ul nu decays. PHYSICAL REVIEW LETTERS. March 2006. 96(12)