QCD Corrections to K-Kbar Mixing in R-symmetric Supersymmetric Models

TL;DR

This paper calculates the leading-log QCD corrections to K-Kbar mixing in R-symmetric supersymmetric models, showing they can significantly tighten bounds on kaon mass difference and CP violation phases, similar to MSSM effects.

Contribution

It provides the first detailed computation of QCD corrections to K-Kbar mixing specifically within R-symmetric supersymmetric models using effective field theory.

Findings

QCD corrections can tighten the kaon mass difference bound by about a factor of three.

QCD corrections can reduce CP violation phases by up to a factor of ten.

The analysis focuses on models where gluinos are much heavier than squarks.

Abstract

The leading-log QCD corrections to K-Kbar mixing in R-symmetric supersymmetric models are computed using effective field theory techniques. The spectrum topology where the gluino is significantly heavier than the squarks is motivated and focused on. It is found that, like in the MSSM, QCD corrections can tighten the kaon mass difference bound by roughly a factor of three. CP violation is also briefly considered, where QCD corrections can constrain phases to be as much as a factor of ten smaller than the uncorrected value.