Sfermion loop contribution to the two-loop level fermion electric dipole moment in R-parity violating supersymmetric models

TL;DR

This paper calculates a specific two-loop contribution to fermion electric dipole moments in R-parity violating supersymmetric models, revealing its destructive interference with known contributions and its significance depending on superpartner masses.

Contribution

It introduces the sfermion loop contribution to the two-loop fermion EDM in R-parity violating SUSY, highlighting its potential impact under certain mass hierarchies.

Findings

Sfermion loop contribution acts destructively to known fermion loop effects.

The contribution is small when squarks or sleptons are heavy.

It becomes significant if sneutrinos are much heavier than sfermions.

Abstract

We evaluate the Barr-Zee type two-loop level contribution to the fermion electric and chromo-electric dipole moments with sfermion loop in R-parity violating supersymmetric models. It is found that the Barr-Zee type fermion dipole moment with sfermion loop acts destructively to the currently known fermion loop contribution, and that it has small effect when the mass of squarks or charged sleptons in the loop is larger than or comparable to that of the sneutrinos, but cannot be neglected if the sneutrinos are much heavier than loop sfermions.