MSSM corrections to the top-antitop quark forward-backward asymmetry at the Tevatron

TL;DR

This paper investigates how one-loop supersymmetric corrections within the MSSM framework can influence the top-antitop quark forward-backward asymmetry observed at the Tevatron, providing a detailed parameter space analysis.

Contribution

It offers the first comprehensive scan of the complex MSSM parameter space to quantify maximal supersymmetric contributions to the ttbar asymmetry.

Findings

Supersymmetric corrections can significantly affect the asymmetry.

Maximal MSSM contributions are constrained by flavor violation limits.

Results help interpret Tevatron asymmetry measurements in supersymmetric models.

Abstract

We study the effects of the complete supersymmetric QCD and electroweak one-loop corrections to the ttbar forward-backward asymmetry at the Fermilab Tevatron collider. We work in the complex Minimal Supersymmetric Standard Model (MSSM), only restricted by the condition of minimal flavor violation (MFV). We perform a comprehensive scan over the relevant parameter space of the complex MFV-MSSM and determine the maximal possible contributions of these MSSM loop corrections to the forward-backward asymmetry in the ttbar center-of-mass frame.