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

TL;DR

This paper investigates the potential presence of the isoscalar dibaryon resonance D_{03}(2380) in higher energy reactions involving deuterons, using a model based on previous findings in pn interactions.

Contribution

The study extends the search for the D_{03}(2380) dibaryon resonance to $pd o pd\pi\pi$ and $dd o dd\pi\pi$ reactions at higher energies, applying a previously proposed reaction model.

Findings

Estimated cross sections for the reactions at higher energies.

Predicted signatures of the dibaryon resonance in these reactions.

Provided theoretical groundwork for future experimental searches.

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.