Abstract
We present a measurement of the branching fraction of invisible decays, using of data collected at the resonance with the CLEO III detector at CESR. After subtracting expected backgrounds from events that pass selection criteria for invisible decay in , we deduce a 90% C.L. upper limit of .
- Received 21 December 2006
DOI:https://doi.org/10.1103/PhysRevD.75.031104
©2007 American Physical Society