Supersymmetric QCD Parity Nonconservation in Top Quark Pairs at the Tevatron

Abstract

In the supersymmetry (SUSY) models, because of the mass difference between the left- and right-top squarks, the supersymmetric QCD interactions can generate parity violating effects in the production of $t\bar{t}$ pairs. We show that SUSY QCD radiative corrections to the parity violating asymmetry in the production rates of the left- and right-handed top quarks via the $q\bar{q}\text{ra}t\bar{t}$ process can reach about 3% at the Fermilab Tevatron with $\sqrt{s}=2$ TeV. This could be observable with an integrated luminosity larger than $2f{b}^{-1}$. We also show that in these models the SUSY QCD radiative corrections to the $t\bar{t}$ production rate are small unless gluinos are very light, of the order of 1 GeV.

Comments: 12 pages, revised version, accepted by Phys. Lett. B