Implications of CP Violation in Hyperon Decays
Abstract
It is generally believed that the only known reaction in whichC p violation definitely occurs is in the decay of the long-lived neutralK-mesonK L → π+π-,K L → π0π0, andK L →e ±π± v (Christensonet al., 1964: Sivaram, 1982). No attempt has been made to studyC p violation outside theK-system for quite a long time. Recently,C p violation effects have been reported in the hyperon decays through the reactionbar PP to bar Λ Λ {text{ and }}bar PP to bar Ξ Ξ (Bassompierre, 1990) with asymmetry at the level of 10-3 to 10-4. In this paper we examine the possible implications of hyperon decays asymmetry in some cosmic-ray sources. We identify cosmic-ray sources where such decays can occur. The signatures for measuring these asymmetries in both the laboratory and cosmic-ray sources are examined. It is found that there is a correlation between these signatures. We conclude that hyperon decays contribute significantly toC p violation observed in cosmic-ray sources.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- January 1992
- DOI:
- 10.1007/BF00643398
- Bibcode:
- 1992Ap&SS.187..319A
- Keywords:
-
- Hyperons;
- Nuclear Astrophysics;
- Quantum Theory;
- Radioactive Decay;
- Relativistic Theory;
- Active Galactic Nuclei;
- Cosmic Rays;
- Extragalactic Radio Sources;
- Supernovae;
- Space Radiation