A reappraisal of two-loop contributions to the fermion electric dipole moments in R-parity violating supersymmetric models

TL;DR

This paper reevaluates two-loop contributions to fermion EDMs in R-parity violating supersymmetry, finding that previous estimates were overestimated and that experimental constraints on RPV couplings are less strict.

Contribution

It provides a revised calculation of two-loop RPV contributions to fermion EDMs, showing they are smaller than previously thought.

Findings

Leading Barr-Zee type contributions are smaller than earlier estimates.

EDM data impose looser bounds on RPV couplings.

Reassessment impacts constraints on supersymmetric models.

Abstract

We reexamine the R-parity violating contribution to the fermion electric and chromo-electric dipole moments (EDM and cEDM) in the two-loop diagrams. It is found that the leading Barr-Zee type two-loop contribution is smaller than the result found in previous works, and that EDM experimental data provide looser limits on RPV couplings.