Evidence For B0 -> rho0 K0S
Abstract
We present evidence for the decay B0->rho0 K0s. The results are obtained from a data sample of 227 10^6 Y(4S) -> BBbar decays collected with the BABAR detector at the PEP-II asymmetric-energy B-Factory at SLAC. From a maximum-likelihood fit giving a yield of 99+/-19 events and efficiency estimated from simulation we make a preliminary measurement of the branching fraction B0->rho0 K0 =(5.1+/-1.0+/-1.2)10^-6 where the first error is statistical and the second systematic. The hypothesis of zero signal in the rho0 mass region, 600MeV-930MeV, is excluded at the 6.1sigma level. Allowing a B0->f_0(600)K0s contribution in the fit allows us to exclude the hypothesis of zero B0->rho0 K0s at the 3.5sigma level.
Cite
@article{arxiv.hep-ex/0408079,
title = {Evidence For B0 -> rho0 K0S},
author = {B. Aubert and BABAR Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0408079},
year = {2007}
}
Comments
15 pages, 4 eps figures, submitted to ICHEP2004