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Measurements of B→{π,η,η′}lνl branching fractions and determination of |Vub| with semileptonically tagged B mesons

Abstract:

We report measurements of branching fractions for the decays B→P/ν/, where P are the pseudoscalar charmless mesons π-, π0, η and η′, based on 348fb-1 of data collected with the BABAR detector, using B0 and B+ mesons found in the recoil of a second B meson decaying as B→D(*)/ν/. Assuming isospin symmetry, we combine pionic branching fractions to obtain B(B0→π-/+ν/)=(1.54±0. 17(stat)±0.09(syst))×10-4; we find 3.2σ evidence of the decay B+→η/+ν/ and measure its branching fraction to be (0.64±0.2...

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Journal:
Physical Review Letters
Volume:
101
Issue:
8
Publication date:
2008-08-22
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:0d3124f2-90b8-4bbb-9747-a2d0d6668b50
Source identifiers:
211381
Local pid:
pubs:211381
Language:
English

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