Supersymmetric QCD parity nonconservation in top quark pairs at the Tevatron

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 tt̄ 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 qq̄→tt̄ process can reach about 3% at the Fermilab Tevatron with s=2 TeV. This could be observable with an integrated luminosity larger than 2 fb−1. We also show that in these models the SUSY QCD radiative corrections to the tt̄ production rate are small unless gluinos are very light, of the order of 1 GeV.