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Study of B→π ν and B→ρ ν decays and determination of |Vub|

Abstract:

We present an analysis of exclusive charmless semileptonic B-meson decays based on 83×106 BB̄ pairs recorded with the BABAR detector at the Υ(4S) resonance. Using isospin symmetry, we measure branching fractions B(B0→π- +ν)=(1.38±0.10±0.16±0.08)×10-4 and B(B0→ρ- +ν)=(2.14±0.21±0.48±0.28)×10-4, where the errors are statistical, experimental systematic, and due to form-factor shape uncertainties. We compare the measured distribution in q2, the momentum-transfer squared, with theoretical predict...

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Publisher copy:
10.1103/PhysRevD.72.051102

Authors


Boutigny, D More by this author
Couderc, F More by this author
Karyotakis, Y More by this author
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Journal:
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume:
72
Issue:
5
Publication date:
2005-09-01
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
URN:
uuid:b35ff43f-b1e2-4086-9caf-9c55148ee21e
Source identifiers:
315149
Local pid:
pubs:315149
Language:
English

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