Signals forCPViolation in Scalar Tau Pair Production at Muon Colliders

We discuss signals for $\mathrm{CP}$ violation in ${\mu }^{+}{\mu }^{-}\to {\tilde{\tau }}_i^{-}{\tilde{\tau }}_j^{+}$, where $i,j=1,2\mathrm{}$ label the two scalar $\tau$ mass eigenstates. We assume that these reactions can proceed through the production and decay of the heavy neutral Higgs bosons present in supersymmetric models. $\mathrm{CP}$ violation in the Higgs sector can be probed through a rate asymmetry even with unpolarized beams, while the $\mathrm{CP}$-odd phase associated with the $\tilde{\tau }$ mass matrix can be probed only if the polarization of at least one beam can be varied. These asymmetries might be $O\left(1\right)$.