  In minimal supersymmetric model (SUSY) with a light Higgs sector, explicit CP
violation and most general flavor mixings in the sfermion sector, integration
of the superpartners out of the spectrum induces potentially large
contributions to the Yukawa couplings of light quarks via those of the heavier
ones. These corrections can be sizeable even for moderate values of tan(beta),
and remain nonvanishing even if all superpartners decouple. When the SUSY
breaking scale is close to the electroweak scale, the Higgs exchange effects
can compete with the gauge boson and box diagram contributions to rare
processes, and their partial cancellations can lead to relaxation of the
existing bounds on flavor violation sources. In this case there exist sizeable
enhancements in flavor-changing Higgs decays. When the superpartners completely
decouple, however, the Higgs mediation becomes the dominant SUSY contribution
to rare processes the saturation of which, without a strong suppression of the
flavor mixings, prefers large tan(beta) and certain ranges for the CP-odd
phases. The decay rate of the lightest Higgs into light down quarks become
comparable with that into the bottom quark. Moreover, the Higgs decay into the
up quark is significantly enhanced. There are observable implications for rare
processes, atomic electric dipole moments, and collider searches for Higgs
bosons.
