Abstract
We present the first experimental limits on high- contributions to charmless semileptonic decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of from inclusive measurements of . Using a wide range of models based on available theoretical input we set a limit of (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of .
- Received 10 January 2006
DOI:https://doi.org/10.1103/PhysRevLett.96.121801
©2006 American Physical Society