Observation of B+ -> rho+ rho0
High Energy Physics - Experiment
2008-11-26 v1
Abstract
We report the first observation of the charmless vector-vector decay process B+ ->rho+ rho0. The measurement uses a 78 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric e+e- collider operating at the Upsilon(4S) resonance. We obtain a branching fraction of Br(B+ ->rho+ rho0)=(31.7+-7.1(stat.)+3.8-6.7(sys.))*10^{-6}. An analysis of the rho helicity-angle distributions gives a longitudinal polarization of Gamma_{L}/Gamma=(94.8+-10.6(stat.)+-2.1(sys.))%.
Keywords
Cite
@article{arxiv.hep-ex/0306007,
title = {Observation of B+ -> rho+ rho0},
author = {J. Zhang and M. Nakao},
journal= {arXiv preprint arXiv:hep-ex/0306007},
year = {2008}
}
Comments
5 pages, 3 figures, submitted to Phys. Rev. Lett