Hyperon Polarization - an Unresolved Problem

摘要

The fact that hyperons produced in high energy collisions have polarizations as large as 20% was not predicted by theory. These polarizations have allowed high precision measurements of most hyperon magnetic moments and a recent confirmation of the Cabibbo theory involving semileptonic hyperon decays. However a satisfactory quantitative explanation of hyperon polarization is still lacking. The question of whether the omega exp - is produced with significant polarization is crucial to the measurement of its magnetic moment. Present data are inconclusive as to whether the omega exp - is produced polarized. Phenomenological models and data on antihyperon production may not be useful guides in predicting the omega exp - polarization. (ERA citation 10:038069)