Exclusive Semileptonic b->u l nu Decays at CLEO
High Energy Physics - Experiment
2007-05-23 v1 High Energy Physics - Phenomenology
Abstract
Updated CLEO results are presented for branching ratios and four-momentum transfer q^2 dependence of exclusive charmless semileptonic B decays, where the final state hadron is either a pi, rho, omega, eta or eta'. These results have comparable accuracies with those of other experiments. We address the issue of flavor singlet couplings by limiting Gamma(B+ -> eta' l+ nu)/\Gamma(B+ -> eta l+ nu)> 2.5 at 90 % CL}. We also extract a value of |V_{ub}|= (4.3 +/- 0.4 +/-0.2^{+0.6}_{-0.4})x10^{-3} in one particular unquenched lattice QCD model using pi l+nu data above q^2 of 16 GeV^2.
Cite
@article{arxiv.hep-ex/0702036,
title = {Exclusive Semileptonic b->u l nu Decays at CLEO},
author = {S. Stone},
journal= {arXiv preprint arXiv:hep-ex/0702036},
year = {2007}
}
Comments
Presented at 4th Int. Workshop on the CKM Triangle, Nagoya, Japan, Dec. 2006, to appear in the proceedings; 3 pages, 6 figures