|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.

5 pages, 1 figure. Version accepted for publication

References in corpus (4)

• Elastic s-wave B pi, D pi, D K and K pi scattering from lattice calculations of scalar form factors in semileptonic decays
• |V_ub| from UTangles and B->pi l nu
• Extracting |V(ub)| from B->pi l nu Decays Using a Multiply-subtracted Omnes Dispersion Relation
• |Vub| from Exclusive Semileptonic B to pi Decays

Cited by in corpus (11)

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• Determination of the strong coupling $g_{B^{\ast }B\pi }$ from semi-leptonic $B\to \pi \ell \nu$ decay
• $B\to \rho$ semileptonic decays and $|V_{ub}|$
• Large |Vub|: A challenge for the Minimal Flavour Violating MSSM
• Constraints on B--->pi,K transition form factors from exclusive semileptonic D-meson decays
• $B_s$ mesons: semileptonic and nonleptonic decays
• Lattice QCD and Flavour Physics
• Elastic s-wave scattering phase shifts and |Vub| from lattice calculations of form factors for exclusive semileptonic decays
• Semileptonic B decays and the inclusive determination of |V(ub)|