Evidence for the Rare Decay B+ --> Ds+ pi0
High Energy Physics - Experiment
2010-03-19 v2
Abstract
We have searched for the rare decay B+ --> Ds+ pi0. The analysis is based on a sample of 232 million Upsilon(4S) --> B anti-B decays collected with the BABAR detector at the PEP-II e+ e- storage ring. We find 19.6 signal events, corresponding to a significance of 4.7 sigma. The extracted signal yield including statistical and systematic uncertainties is 20.1+6.8+0.4 -6.0-1.5, and we measure B(B+ --> Ds+ pi0) =(1.5 +0.5 -0.4 +- 0.1 +- 0.2) 10^-5, where the first uncertainty is statistical, the second is systematic, and the last is due to the uncertainty on the Ds+ decay and its daughter decay branching fractions.
Cite
@article{arxiv.hep-ex/0611030,
title = {Evidence for the Rare Decay B+ --> Ds+ pi0},
author = {The BABAR Collaboration and B. Aubert},
journal= {arXiv preprint arXiv:hep-ex/0611030},
year = {2010}
}
Comments
7 pages, 2 postscript figures (1 figure removed), accepted by Physics Review Letters