|Vub| from exclusive semileptonic B to pi decays revisited

Abstract

We update the extraction of |Vub| from exclusive semileptonic B to pi decays, combining experimental partial branching fraction information with theoretical form factor calculations, using the recently revised HPQCD results for the form factors f_+ and f_0. We use Omnes representations to provide the required parametrisations of the form factors. The extracted value is 10^3 |Vub| = 3.47+/-0.29+/-0.03, in striking agreement with |Vub| extracted using all other inputs in CKM fits and showing some disagreement with |Vub| extracted from inclusive semileptonic B to pi decays.

arXiv comment5 pages, 1 figure. Version accepted for publication

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Cited by in corpus (22)

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• Two-pole structure of the $D_0^{\ast }(2400)$
• The B -> pi l nu semileptonic form factor from three-flavor lattice QCD: A model-independent determination of |V(ub)|
• Theoretical and Phenomenological Constraints on Form Factors for Radiative and Semi-Leptonic B-Meson Decays
• B->eta(') Form Factors in QCD
• Two-loop Corrections to the B to pi Form Factor from QCD Sum Rules on the Light-Cone and |V(ub)|
• Semileptonic form factors D to pi, K and B to pi, K from a fine lattice
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• Determination of the strong coupling $g_{B^{\ast }B\pi }$ from semi-leptonic $B\to \pi \ell \nu$ decay
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• Hadronic Form Factors: Combining QCD Calculations with Analyticity
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• Lattice QCD and Flavour Physics
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• Semileptonic B decays and the inclusive determination of |V(ub)|