  We report on progress in the development of a microscopic model for the
hyperon-nucleon interaction within the meson-exchange framework, which
incorporates both one-meson as well as correlated two-meson exchange
contributions. The main new feature of the model is the exchange of two
correlated pions or kaons, both in the scalar-isoscalar and the
vector-isovector channels. In the scalar channel it provides the main part of
the intermediate-range interaction between two baryons, thereby eliminating the
need for the fictitious sigma meson, which has been an unavoidable element of
effective one-boson-exchange descriptions.
