DECAY MODES OF CHARGED $Sigma$ HYPERONS
Technical Report
·
OSTI ID:4292377
Apparent SIGMA hyperon decay events in a large emulsion stack of 240 9 in. x 12 in. pellicles were classified into those judged to have occurred at rest and those in flight. Of 36 decay events at rest, 21 secondaries were observed to be protons of about 1675 mu range; these were classified as belonging to the decay mode SIGMA /sup +/ yields p + pi /sup 0/. The remaining 15 SIGMA - like particles which decayed at rest all produced secondaries of near-minimum grain density compatible with the reaction SIGMA /sup +/ yields pi /sup +/ + n. Of the events decaying in flights, 23 were decays into protons and 46 were decays into near-miaimum secondaries. There were in addition 5 decays into protons and 19 decays into near-minimum secondaries which were not classified definitely as at rest or in flight. An attempt was made to trace the tracks of 35 of the lightly ionizing secondaries. Events in flight in which the decay product was emitted in the backward hemisphere relative to the SIGMA momentum were given first priority, as these events have secondaries of the shortest ranges. (auth)
- Research Organization:
- California. Univ., Berkeley. Radiation Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-13-009201
- OSTI ID:
- 4292377
- Report Number(s):
- UCRL-8372
- Country of Publication:
- United States
- Language:
- English
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