Natural suppression of strong P and T non-invariance

In gauge theories with spontaneously broken left-right symmetry, strong P and T non-invariant effects can also be made to vanish naturally in the tree approximation without introducing massless quarks or axions. In a four-flavor SU(2)sub(L)xSU(2)sub(R)xU(1)sub(L+R) model with manifest left-right symmetry, it is shown that strong CP noninvariance is absent up to the one-loop level and weak CP-violation is of superweak type. Extension to the case of six quarks gives a left-right symmetric generalization of the Kobayashi-Maskawa model without axions. (Auth.)