Search for Dibaryon Resonances in the Reactions dd → ddππ and pd → pdππ

The isoscalar dibaryon resonance D_03(2380) , discovered at WASA@COSY in the total cross section of the reaction pn → dπ ⁰π ⁰ and in the elastic pn scattering in the energy range corresponding to the invariant mass of the pn system of 2380 MeV, can reveal itself in the pd → pdπ π and dd → ddπ π reactions at higher energies due to deuteron excitation in the t channel. In this paper, the cross sections of these reactions are estimated based on the model of the reaction pn → dπ ⁰π ⁰ , proposed earlier by Platonova and Kukulin.