First Search for the Flavor Changing Neutral Current Decay D^0 -> gamma gamma
High Energy Physics - Experiment
2010-04-08 v3
Abstract
Using 13.8 fb^{-1} of data collected at or just below the \Upsilon(4S) with the CLEO detector, we report the result of a search for the flavor changing neutral current process D^{0} \to \gamma\gamma. We observe no significant signal for this decay mode and determine 90% confidence level upper limits on the branching fractions Br(D^{0}\to \gamma\gamma)/Br(D^{0}\to\pi^{0}\pi^{0}) < 0.033 and Br(D^{0}\to\gamma\gamma) < 2.9 \times 10^{-5}.''
Cite
@article{arxiv.hep-ex/0212045,
title = {First Search for the Flavor Changing Neutral Current Decay D^0 -> gamma gamma},
author = {CLEO Collaboration and T. E. Coan},
journal= {arXiv preprint arXiv:hep-ex/0212045},
year = {2010}
}
Comments
6 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRL