The Asymmetry Parameter and Branching Ratio of Sigma Plus Radiative Decay
- Yale U.
We have measured the asymmetry parameter and branching ratio of the $$\Sigma^+$$ radiative decay. This high statistics experiment (FNAL 761) was performed in the Proton Center charged hyperon beam at Fermi National Accelerator Laboratory in Batavia, Illinois. We find for the asymmetry parameter -0.720 $$\pm$$ 0.086 $$\pm$$ 0.045 where the first error is statistical and the second is systematic. This result is based on a sample of 34754 $$\pm$$ 212 events. We find a preliminary value for the branching ratio $$Br ( \Sigma^+ \to p\gamma )$$ $$/ Br ( \Sigma^+ \to p \pi^0 )$$ = (2.14 $$\pm$$ 0.07 $$\pm$$ 0.11) x $$10^{-3}$$ where the first error is statistical and the second is systematic. This result is based on a sample of 31040 $$\pm$$ 650 events. Both results are in agreement with previous low statistics measurements.
- 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:
- 1426682
- Report Number(s):
- FERMILAB-THESIS-1992-37; UMI-93-08975; 345573
- Country of Publication:
- United States
- Language:
- English
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