A Measurement of the Branching Ratio of the Weak Radiative Hyperon Decay $$\Xi^0 \to \Lambda \gamma$$
- Minnesota U.
The branching ratio $$\Xi^0 \to \Lambda \gamma$$ / $$\Xi^0 \to \Lambda \pi^0$$ has been measured at the Fermilab National Acceleator Laboratory neutral hyperon facility. 30,000 $$\Xi^0 \to \Lambda \pi^0$$ decays were detected by identifying the subsequent $$\Lambda \to p \pi^-$$ and $$\pi^0 \to \gamma\gamma$$ decays in a multi wire proportional chamber magnetic spectrometer and an array of lead glass. A sample of 6.7 x $10^5$ $$\Lambda = \gamma$$ events were analyzed for $$\Xi^0 \to \Lambda \gamma$$ decays. A sample of 139 ± 12 $$\Xi^0 \to \Lambda \gamma$$ decays were identified. Monte Carlo studies gave the relative acceptances of the two decay types in the apparatus, and in turn the branching ratio. The branching ratio is 1.27 ± 0.11 x $$10^{-3}$$, with a possible systematic error of ± 0.22 x $$10^{-3}$$.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1433221
- Report Number(s):
- FERMILAB-THESIS-1987-02; RX-1189 (MINNESOTA); 251841
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of. sigma. /sup -/. -->. lambda. e/sup -/ and. xi. /sup -/. -->. lambda. e/sup -/. nu. branching ratios
Branching ratio and asymmetry for. Xi. sup 0 r arrow. Lambda. gamma