A Search for Invisible Decays of the Upsilon(1S)
High Energy Physics - Experiment
2010-04-12 v2
Abstract
We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4 x 10^{6} Upsilon(3S) mesons collected at the BaBar/PEP-II B-factory. We select events containing the decay Upsilon(3S) -> pi+ pi- Upsilon(1S) and search for evidence of an undetectable Upsilon(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction BR(Upsilon(1S) -> invisible) < 3.0 x 10^{-4} at the 90% confidence level.
Keywords
Cite
@article{arxiv.0908.2840,
title = {A Search for Invisible Decays of the Upsilon(1S)},
author = {The BABAR Collaboration and B. Aubert},
journal= {arXiv preprint arXiv:0908.2840},
year = {2010}
}
Comments
7 pages, 3 postscript figures, submitted to Physical Review Letters