We present an analysis of the thermalization rate of Higgsinos and winos
based on the imaginary part of the two-point Green function in the {\it
unbroken} phase of the MSSM. We use improved propagators including resummation
of hard thermal loops and the thermalization rate is computed at the one-loop
level in the high temperature approximation. We find that the damping is
typically dominated by scattering with gauge bosons, resulting in a damping
rate of about \gamma_{\Ht}\simeq 0.025T, \gamma_{\Wt}\simeq 0.065T. The
contribution from scattering with scalars is relatively small. Implications for
baryogenesis are also discussed.Comment: 10 pages LaTEX, 1 ps figur
