A Measurement of the Muonic Dalitz Decay of the Neutral Kaon
- UCLA
We report on a measurement of the decay $$K_L \to \mu^+ \mu^- \gamma$$ from Fermilab experiment E799. We observe 207 candidate signal events with an estimated background of 10.5 $$\pm$$ 4.0 events and establish $$B(K_L \to \mu^+ \mu^- \gamma$$ ) = (3.23 $$\pm$$ 0.23(stat) $$\pm$$ 0.19(sys)) x $$10^{-7}$$. This provides the first measurement of the $$K\gamma\gamma^*$$ form factor in the muonic Dalitz decay mode of the $$K_L$$.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1423668
- Report Number(s):
- FERMILAB-THESIS-1995-55; UCLA-HEP-95-002; UMI-96-01371; 406524
- Country of Publication:
- United States
- Language:
- English
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