High-Precision Tests of the MSSM with GigaZ

TL;DR

The paper discusses how the GigaZ option of the ILC can precisely test the MSSM by measuring electroweak observables, potentially revealing SUSY effects even if particles are too heavy for direct detection.

Contribution

It provides a comprehensive analysis of MSSM predictions including full one-loop and two-loop corrections, highlighting the potential of GigaZ for indirect SUSY detection.

Findings

GigaZ can detect virtual SUSY effects beyond LHC reach

Electroweak precision measurements are highly sensitive to MSSM parameters

Full loop corrections improve the accuracy of MSSM predictions

Abstract

We review the physics potential of the GigaZ option of the International Linear Collider (ILC) for probing the Minimal Supersymmetric Standard Model (MSSM) via the sensitivity of the electroweak precision observables measured at the ILC to quantum corrections. A particular focus is put on the effective leptonic weak mixing angle, sin^2_theta_eff. The MSSM predictions take into account the complete one-loop results including the full complex phase dependence, all available MSSM two-loop corrections as well as the full Standard Model (SM) results. We find that the anticipated experimental accuracy at the ILC with GigaZ option may resolve the virtual effects of SUSY particles even in scenarios where the SUSY particles are so heavy that they escape direct detection at the LHC and the first phase of the ILC.