|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. 
Jonathan M Flynn (Southampton, U), Yoshiyuki Nakagawa (Osaka, U.),   Juan Nieves (IFIC, CSIC-UV) and Hiroshi Toki (Osaka, U.)