Two-loop level rainbowlike supersymmetric contribution to the fermion electric dipole moment

TL;DR

This paper calculates two-loop supersymmetric contributions to fermion electric dipole moments, revealing they can dominate over previously known Barr-Zee diagrams in certain TeV scale scenarios.

Contribution

It introduces a detailed calculation of two-loop rainbow-like diagrams in supersymmetry, highlighting their significance in EDM predictions.

Findings

Two-loop contributions can dominate Barr-Zee diagrams in some cases.

Chromo-electric dipole moments are significantly affected by top-stop loops.

Results impact the interpretation of EDM experiments in supersymmetric models.

Abstract

We calculate the two-loop level electric and chromo-electric dipole moments of the fermion involving fermion-sfermion inner loop, gaugino, and higgsino in the minimal supersymmetric standard model, and analyze the chromo-electric dipole moment with the top-stop inner loop. It is found that this contribution is comparable with, and even dominates in some situation over the Barr-Zee type diagram generated from the CP-violation of the top squark sector in TeV scale supersymmetry breaking.