Stau study at the ILC and its implication for the muon g-2 anomaly

TL;DR

This paper explores how measurements of stau particles at the ILC can help accurately reconstruct the SUSY contribution to the muon g-2 anomaly, achieving about 1% precision.

Contribution

It demonstrates the potential of the ILC to precisely determine stau parameters and their impact on the muon g-2 within supersymmetric models.

Findings

SUSY contribution to muon g-2 can be reconstructed with ~1% accuracy at the ILC.

Stau mass and mixing parameters can be quantitatively determined at the ILC.

Implications for supersymmetric explanations of the muon g-2 anomaly are discussed.

Abstract

Once all the sleptons as well as the Bino are observed at the ILC, the Bino contribution to the muon anomalous magnetic dipole moment (muon $g-2$) in supersymmetric (SUSY) models can be reconstructed. Motivated by the recently confirmed muon $g-2$ anomaly, we examine the reconstruction accuracy at the ILC with $\sqrt{s}$ = 500 GeV. For this purpose, measurements of stau parameters are important. We quantitatively study the determination of the mass and mixing parameters of the staus at the ILC. Furthermore, we discuss the implication of the stau study to the reconstruction of the SUSY contribution to the muon $g-2$. At the benchmark point of our choice, we find that the SUSY contribution to the muon $g-2$ can be determined with a precision of $\sim 1\%$ at the ILC.