# $d^*(2380)$ and its partners in a diquark model

## TL;DR

This paper models the $d^*(2380)$ dibaryon and its SU(3) partners as three-vector diquarks, calculating their masses and decay widths, which align with experimental data and provide insights into their narrow decay widths.

## Contribution

It introduces a diquark model for $d^*(2380)$ and its partners, predicting their properties and explaining the narrow decay width through quark tunneling effects.

## Key findings

- Calculated mass and decay width match experimental data.
- Narrow decay width explained by tunneling suppression.
- Predicted properties of SU(3) partners.

## Abstract

The purpose of the present study was to explore the possibility of accommodating the $d^*(2380)$ and its flavor SU(3) partners in a diquark model. Proposing that $d^*(2380)$ is composed of three vector diquarks, its mass is calculated by use of an effective Hamiltonian approach and its decay width is estimated by considering the effects of quark tunneling from one diquark to the others and the decays of the subsequent two-baryon bound state. Both the obtained mass and decay width of $d^*(2380)$ are in agreement with the experimental data, with the unexpected narrow decay width being naturally explained by the large tunneling suppression of a quark between a pair of diquarks. The masses and decay widths of the flavor SU(3) partners of $d^*(2380)$ are also predicated within the same diquark scenario.