|Vub| from Exclusive Semileptonic B--> rho Decays

Details |Vub| from Exclusive Semileptonic B--> rho Decays |Vub| from Exclusive Semileptonic B--> rho Decays

2008-12-15

arxiv.org/abs/0812.2795v1

Phys.Lett.B675:326-331,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages and 1 figure

Scientific paper

10.1016/j.physletb.2009.04.037

We use Omnes representations of the form factors V, A_1 and A_2 for exclusive semileptonic B--> rho decays, and apply them to combine experimental partial branching fraction information with theoretical calculations of the three form factors to extract |Vub|. We find a slightly lower result, |Vub|=(2.8 +- 0.2)x 10^{-3}, than the values extracted from exclusive semileptonic B-->pi decays and using all other inputs in CKM fits. The disagreement is greater when we compare to the result extracted from inclusive B -> X_u l nu decays.

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