The d*(2380) and its family of pion assisted dibaryons

TL;DR

This paper reviews the status of $N\Delta$ and $\Delta\Delta$ dibaryons, focusing on the d*(2380) resonance, and discusses its likely hadronic structure over a six-quark model.

Contribution

It provides a brief review of dibaryon states, especially the d*(2380), and argues for its hadronic structure based on width considerations.

Findings

d*(2380) has a narrow width of about 70 MeV.

The d*(2380) is likely a $\Delta\Delta$ dibaryon resonance.

Hadronic structure is favored over six-quark models for d*(2380).

Abstract

The status of $N\Delta$ and $\Delta\Delta$ dibaryons introduced by Dyson and Xuong in 1964 is briefly reviewed with focus on the d*(2380), tentatively assigned as a $\Delta\Delta$ dibaryon resonance. It is argued that the apparently small value of width, $\Gamma_{d^\ast}$$\approx$70 MeV, favors hadronic structure for the d*(2380) dibaryon rather than a six-quark structure.