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Measurement of the B^{0}→π^{-}ℓ^{+}ν and B^{+}→η^{(′)}ℓ^{+}ν branching fractions, the B^{0}→π^{-}ℓ^{+}ν and B^{+}→ηℓ^{+}ν form-factor shapes, and determination of |V_{ub}|
Gershon, T. J..  Physical Review D (Particles, Fields, Gravitation and Cosmology).  v. Volume 83. no. Number 5.   2011-03-24. p. 00 - issn: 1550-7998 .   

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