Abstract
We report a search for the decay → based on a data sample of 9.6 collected at the ψ(3770) resonance with the Mark III detector at the SLAC storage ring SPEAR. We find no evidence for this flavor-changing weak-neutral-current decay and set an upper limit on the branching ratio of B(→)<1.3× at the 90% confidence level. This limit constrains various extensions of the standard model.
- Received 18 December 1987
DOI:https://doi.org/10.1103/PhysRevD.37.2023
©1988 American Physical Society