  The associated production of a $J/{\psi}$ and a $\pi$-meson in
antiproton-nucleon annihilation is studied in the framework of QCD collinear
factorization. In this approach, a hard subprocess responsible for the
production of the heavy quark-antiquark pair factorizes from soft hadronic
matrix elements, such as the antiproton (nucleon) distribution amplitude and
the nucleon-to-pion (antiproton-to-pion) transition distribution amplitude.
This reaction mechanism should dominate the forward and backward kinematical
regions, where the cross sections are expected to be measurable in the set-up
of the PANDA experiment at the GSI-Fair facility.
