|Vub| from Exclusive Semileptonic B--> rho Decays
High Energy Physics - Phenomenology
2010-11-19 v1
Abstract
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.
Cite
@article{arxiv.0812.2795,
title = {|Vub| from Exclusive Semileptonic B--> rho Decays},
author = {Jonathan M Flynn and Yoshiyuki Nakagawa and Juan Nieves and Hiroshi Toki},
journal= {arXiv preprint arXiv:0812.2795},
year = {2010}
}
Comments
9 pages and 1 figure