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Measurement of the decay B-0 -> pi(-) l(+) nu and determination of vertical bar V-ub vertical bar

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Abstract

We present a measurement of the charmless semileptonic decay B-0 -> pi(-) l(+) nu using a data sample containing 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating near the Y(4S) resonance. We determine the total branching fraction of the decay, B(B-0 -> pi(-) l(+) nu) = (1.49 +/- 0.04(stat) +/- 0.07(syst)) x 10(-)4. We also report a new precise measurement of the differential decay rate and extract the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar using model-independent and model-dependent approaches. From a simultaneous fit to the measured differential decay rate and lattice QCD results, we obtain vertical bar V-ub vertical bar (3.43 +/- 0: 33) x 10(-3), where the error includes both experimental and theoretical uncertainties

Topics: FORM-FACTORS, MESON DECAYS, MONTE-CARLO, BELLE, HEAVY, IDENTIFICATION, SYMMETRY, DETECTOR, PHYSICS, SHAPES
Publisher: AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Year: 2011
DOI identifier: 10.1103/PhysRevD.83.071101
OAI identifier: oai:repository.hanyang.ac.kr:20.500.11754/35558
Provided by: HANYANG Repository
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