Search for dibaryon resonances in the reactions $dd\to dd\pi\pi$ and $pd \to pd\pi\pi$

Abstract

The isoscalar dibaryon resonance $D_{03}(2380)$, discovered at WASA@COSY in the total cross section of the reaction $pn\to d\pi^0\pi^0$ 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 $pd\to pd\pi\pi$ and $dd\to dd\pi\pi$ 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 $pn\to d\pi^0\pi^0$, proposed earlier by Platonova and Kukulin.