## Dissertations, Theses, and Masters Projects

1989

Dissertation

#### Degree Name

Doctor of Philosophy (Ph.D.)

Physics

John R Kane

#### Abstract

A sample of 87 events of the GIM suppressed decay K$\sb{\rm L} \to \mu\sp+\mu\sp-$ were observed in an experiment performed in 1988 at the Brookhaven National Laboratory. Concurrently, 8,887 examples of the CP-violating decay K$\sb{\rm L} \to \pi\sp+\pi\sp-$ were also seen. The apparatus consisted of a double-magnet spectrometer as well as electromagnetic and muon detector systems. From the previously measured branching ratio for K$\sb{\rm L} \to \pi\sp+\pi\sp-$ and the different instrumental acceptances of the detector for the two decays, the data sample was normalized to the effective number of K$\sb{\rm L}$ decays observed. A value for the ratio (K$\sb{\rm L} \to \mu\sp+\mu\sp-)$/(K$\sb{\rm L} \to$ anything) of (5.7 $\pm$ 0.6(stat.) $\pm$ 0.3(syst.)) $\times$ 10$\sp{-9}$ was obtained.

#### DOI

https://dx.doi.org/doi:10.21220/s2-dv7n-cj19