|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 (3)

• 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
• |Vub| from Exclusive Semileptonic B to pi Decays

Cited by in corpus (6)

• Light-cone sum rules for $B\to \pi$ form factors revisited
• Inclusive semileptonic B decays and the determination of |V_ub|
• Large |Vub|: A challenge for the Minimal Flavour Violating MSSM
• Lattice QCD and Flavour Physics
• Semileptonic B decays and the inclusive determination of |V(ub)|
• Elastic s-wave scattering phase shifts and |Vub| from lattice calculations of form factors for exclusive semileptonic decays