### Session D12: Rare B Decays, B-Baryon

1:30 PM–2:30 PM, Saturday, February 13, 2010
Room: Virginia A

Chair: Douglas Roberts, University of Maryland

Abstract ID: BAPS.2010.APR.D12.3

### Abstract: D12.00003 : Study of charmless semileptonic $B$ decays at {\sl B{\scriptsize A}B{\scriptsize AR}}

1:54 PM–2:06 PM

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#### Author:

Wells Wulsin
(SLAC)

We present an analysis of charmless semileptonic $B$-meson decays recorded with the {\sl B{\scriptsize A}B{\scriptsize AR}} detector at the $\Upsilon(4S)$ resonance. We measure branching fractions for the exclusive modes $B \rightarrow (\pi/\rho/\omega) \ell \nu$. We compare the measured distribution in $q^2$, the momentum-transfer squared, with theoretical predictions based on lattice QCD, light-cone sum rules, and quark model form factor calculations. We also extract the CKM matrix element $|V_{ub}|$ from $B \rightarrow \pi\ell\nu$ decays.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.APR.D12.3