In this work we compute the CP-violating currents of the right-handed stops
and Higgsinos, induced by the presence of non-trivial vacuum expectation values
of the Higgs fields within the context of the minimal supersymmetric extension
of the Standard Model (MSSM) with explicit CP-violating phases. Using the
Keldysh formalism, we perform the computation of the currents at finite
temperature, in an expansion of derivatives of the Higgs fields. Contrary to
previous works, we implement a resummation of the Higgs mass insertion effects
to all orders in perturbation theory. While the components of the right-handed
stop current j^\mu_{\widetilde t_R} become proportional to the difference H_2
\partial^{\mu}H_1-H_1 \partial^{\mu} H_2 (suppressed by \Delta\beta), the
Higgsino currents, j^\mu_{\widetilde{H}_i}, present contributions proportional
to both H_2 \partial^{\mu}H_1\pm H_1 \partial^{\mu} H_2. For large values of
the charged Higgs mass and moderate values of \tan\beta the contribution to the
source proportional to H_2 \partial^{\mu}H_1+H_1 \partial^{\mu} H_2 in the
diffusion equations become sizeable, although it is suppressed by the Higgsino
number violating interaction rate \Gamma_\mu^{-1/2}. For small values of the
wall velocity, 0.04\simlt v_\omega \simlt 0.1, the total contribution leads to
acceptable values of the baryon asymmetry for values of the CP-violating phases
\phi_{CP} in the range 0.04\simlt|\sin\phi_{CP}|\simlt 1. Finally, we comment
on the relevance of the latest results of Higgs searches at LEP2 for the
mechanism of electroweak baryogenesis within the MSSM.Comment: 27 pages, 4 figures, latex2e. Typo corrected and references adde
