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.

Comments: 8 pages, 4 figures