QCD Corrections to Quark (Chromo)Electric Dipole Moments in High-scale Supersymmetry

TL;DR

This paper investigates how quantum chromodynamics (QCD) corrections affect quark electric and chromoelectric dipole moments in high-scale supersymmetry scenarios, revealing significant deviations from previous estimates.

Contribution

It provides a detailed analysis of QCD corrections to CP-violating operators in high-scale SUSY using renormalization-group equations, highlighting substantial differences from earlier work.

Findings

Low-energy quark EDMs may differ by about 100% from previous estimates.

Chromoelectric dipole moments could differ by approximately 10%.

Effective theoretical approach clarifies the impact of large mass hierarchies.

Abstract

Recent results from the LHC experiments, both for the Higgs mass measurement and the direct search for supersymmetric (SUSY) particles, might indicate that the SUSY breaking scale is much higher than the electroweak scale. Although it is difficult to investigate such a scenario at collider experiments, the measurement of the hadronic electric dipole moments is one of promising ways to detect the effects of the SUSY particles. These effects are expressed in terms of the CP-violating effective operators defined at the SUSY breaking scale, which involve quarks, gluons, photons, and gluinos. In this paper, we discuss the QCD corrections to the effective operators in the high-scale SUSY scenario. To appropriately evaluate the radiative corrections in the presence of large mass hierarchy among the SUSY particles, we exploit an effective theoretical approach based on the renormalization-group equations. As a result, it is found that the low-energy quark electric and chromoelectric dipole moments may differ from those evaluated in previous works by O(100) % and O(10) %, respectively.