# Electromagnetic properties of the $d^*(2380)$ hexaquark

## TL;DR

This paper explores the electromagnetic characteristics of the $d^*(2380)$ hexaquark, assessing experimental sensitivities to its size, structure, and multipole moments using quark and pion cloud models.

## Contribution

It provides theoretical predictions on the $d^*(2380)$'s properties and how upcoming experiments can measure its magnetic moment and deformation.

## Key findings

- $d^*(2380)$ is mainly produced from the deuteron's D-wave component.
- The intrinsic quadrupole deformation of $d^*(2380)$ is small.
- Experiments can constrain the $d^*(2380)$ magnetic moment and M3/E2 ratio.

## Abstract

Experiments with intense photon and electron beams have the potential to provide access to nontrivial properties of the recently discovered $d^*(2380)$ hexaquark including its size, structure, magnetic moment, quadrupole and octupole deformations. In this paper we investigate the sensitivity of ongoing and planned experiments to various properties of the $d^*(2380)$, employing models based on both constituent quark and pion cloud frameworks. Our calculations indicate that for photoinduced reactions on the deuteron the $d^*(2380)$ is predominantly produced from the $D-wave$ component of the deuteron. We confirm earlier findings that the intrinsic quadrupole deformation of the $d^*(2380)$ should be small. We also demonstrate an ability to extract the $d^*(2380)$ magnetic moment and put constrains on the $d^*(2380)$ $M3/E2$ ratio.