  R parity violation can induce mixing of the supersymmetric Higgs bosons with
the sneutrinos at the tree level. We study the effect of this mixing on the
decays of Higgs scalars as well as sneutrinos in an effective model where the
violation of R parity is included in the minimal supersymmetric model through
bilinear lepton number violating superpotential terms. We show that a small
violation of R parity can lead to a sizeable branching ratio for the
supersymmetric Higgs boson decay mode $H \to \chi \ell$ (where $\chi$ denotes
an electroweak gaugino and $\ell$ is either a tau neutrino or a tau lepton).
Relevant constraints on R parity violation as well as those coming from SUSY
particle searches still allow the decay $H \to \chi \ell$ to compete with the
conventional decay $H\ra b \bar{b}$, at least for some ranges of parameters of
the model. Moreover, the tau sneutrino will have dominant R parity violating
decays to standard model fermions $b \bar{b}$, $\tau^+ \tau^-$ or to the
invisible mode $\nu \bar{\nu}$ whenever the phase space for R parity conserving
channels is closed.
