Supersymmetric Electroweak Parity Nonconservation in Top Quark Pair Production at the Fermilab Tevatron

Abstract

We evaluate the supersymmetric (SUSY) electroweak corrections to the effect of parity nonconservation in $q\bar{q}\to t\bar{t}$ production at the Fermilab Tevatron predicted by the Minimal Supersymmetric Model (MSSM). We find that the parity nonconserving asymmetry from the SUSY electroweak and SUSY Yukawa loop corrections predicted by the minimal supergravity (mSUGRA) model and the MSSM models with scenarios motivated by current data is about one percent. It will be challenging to observe such a small asymmetry at the Tevatron with 10 fb^{-1} of luminosity. It could however be observable if both the top- and bottom-squarks are light and $\tan \beta$ is smaller than 1, though theses parameters are not favored by mSUGRA.

Comments: revised version, some new numerical results added