Studying the $\omega$ properties in pA collisions via the   $\omega{\to}\pi^0\gamma$ decay
  Within transport calculations we study the production and decay of $\omega$-mesons in $pA$ reactions at COSY energies including elastic and inelastic ${\omega}N$ rescattering, the $\omega{\to}\pi^0\gamma$ Dalitz decay as well as $\pi^0 N$ rescattering. The resulting invariant $\pi^0 \gamma$ mass distributions indicate that in-medium modifications of the $\omega$-meson may be observed experimentally. 
A. Sibirtsev (Giessen U.), V. Hejny (IKP FZJ), H. Str\"oher (IKP FZJ),   W. Cassing (Giessen U.)