Electric Dipole Moments and the Mass Scale of New T-Violating, P-Conserving Interactions

TL;DR

This paper analyzes how experimental limits on electric dipole moments constrain the mass scale of new T-violating, P-conserving interactions, suggesting they occur at energies above 100 TeV.

Contribution

It demonstrates that one-loop EDM constraints are stronger than previous two-loop limits, establishing a lower bound of 100 TeV on the new TVPC interaction scale.

Findings

One-loop EDM constraints surpass two-loop limits.

Lower bound on TVPC mass scale is 100 TeV.

TVPC matrix element ratio is less than 10^{-15}.

Abstract

We consider the implications of experimental limits on the permanent electric dipole moment (EDM) of the electron and neutron for possible new parity-conserving (PC) time-reversal violating (TV) interactions. We show that the constraints derived from one-loop contributions to the EDM exceed previously reported two-loop limits by more than an order of magnitude and imply a lower bound on the new TVPC mass scale $\lamtv$ of 100 TeV for new TVPC strong interactions. These results imply a value of $10^{-15}$ or smaller for the ratio of low-energy TVPC matrix elements to those of the residual strong interaction.