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

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.