Physics of Polarized Hyperons: Production Polarization of Negative Sigma Baryon and Negative XI Baryon and Radiative Decay of Positive Sigma Baryon.
Abstract
The polarized charged hyperon beam at Fermilab has been used to investigate several important issues in hyperon physics. A detailed report of the result for the branching ratio for the radiative decay of the Sigma^{+} hyperon is given here. We find BR(Sigma^{+} to p gamma )/BR(Sigma^{+} to p pi^0) to be 2.32 +/- 0.11(stat) +/- 0.10(syst)) times 10^{-3} with a sample of 31901 events. We also discuss the implications of this result in combination with the measurement of the asymmetry parameter also done in this experiment. The first measurement of the polarization of Sigma^- and Xi^- produced with 800 GeV proton beam and a Cu target was performed. We present these data along with a summary of existing data on polarized beams to aid those trying to construct new hyperon beams or models of the largely unexplained field of hyperon polarization.
- Publication:
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Ph.D. Thesis
- Pub Date:
- January 1995
- Bibcode:
- 1995PhDT........20T
- Keywords:
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- Physics: Elementary Particles and High Energy