Evidence for B+ -> K*0bar K*+
High Energy Physics - Experiment
2010-04-12 v1
Abstract
We present measurements of the branching fraction and fraction of longitudinal polarization for the decay B+ -> K*0bar K*+ with a sample of 467 +/- 5 million BBbar pairs collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. We obtain the branching fraction Br(B+ -> K*0bar K*+) = (1.2 +/- 0.5 +/- 0.1) x 10^{-6} with a significance of 3.7 standard deviations including systematic uncertainties. We measure the fraction of longitudinal polarization f_L = 0.75+0.16-0.26 +/- 0.03. The first error quoted is statistical and the second is systematic.
Cite
@article{arxiv.0901.1223,
title = {Evidence for B+ -> K*0bar K*+},
author = {The BABAR Collaboration and B. Aubert},
journal= {arXiv preprint arXiv:0901.1223},
year = {2010}
}
Comments
8 pages, 14 postscript figures, submitted to Phys. Rev. D. RC