UniversalCP-Nonconserving Theories

Abstract

The assumptions of the normal phenomenological weak-interaction theory are examined, and successively relaxed with a view to listing systematically all theories which are in varying degrees similar to the usual theory. A theory is found, of the current-current form, which is universal in the conventional sense, uses only $V-A$ currents, is capable of yielding $\mathrm{CP}$ violation, and is consistent with all existing experimental results.