%0 Journal Article
%T P,T-Violating Nuclear Matrix Elements in the One-Meson Exchange Approximation
%A I. S. Towner
%A A. C. Hayes
%J Physics
%D 1994
%I arXiv
%R 10.1103/PhysRevC.49.2391
%X Expressions for the P,T-violating NN potentials are derived for $\pi$, $\rho$ and $\omega$ exchange. The nuclear matrix elements for $\rho$ and $\omega$ exchange are shown to be greatly suppressed, so that, under the assumption of comparable coupling constants, $\pi$ exchange would dominate by two orders of magnitude. The ratio of P,T-violating to P-violating matrix elements is found to remain approximately constant across the nuclear mass table, thus establishing the proportionality between time-reversal-violation and parity-violation matrix elements. The calculated values of this ratio suggest a need to obtain an accuracy of order $ 5 \times 10^{-4}$ for the ratio of the PT-violating to P-violating asymmetries in neutron transmission experiments in order to improve on the present limits on the isovector pion coupling constant.
%U http://arxiv.org/abs/nucl-th/9402026v1