What can we learn from the electromagnetic properties of hidden-charm molecular pentaquarks with single strangeness?

Abstract

Inspired by the observation of the ${P}_{\ensuremath{\psi}s}^{\mathrm{\ensuremath{\Lambda}}}(4459)$ and ${P}_{\ensuremath{\psi}s}^{\mathrm{\ensuremath{\Lambda}}}(4338)$, we systematically investigate the magnetic moments, the transition magnetic moments, and the radiative decay behaviors of the $S$-wave isoscalar ${\mathrm{\ensuremath{\Xi}}}_{c}^{(\ensuremath{'})}{\overline{D}}^{(*)}$ molecular pentaquark states in this work. Our quantitative investigation shows that their electromagnetic properties can provide important hints to decode the inner structure of these discussed isoscalar ${\mathrm{\ensuremath{\Xi}}}_{c}^{(\ensuremath{'})}{\overline{D}}^{*}$ molecular pentaquarks. As a potential research issue, we suggest future experiments to focus on the electromagnetic properties of these isoscalar ${\mathrm{\ensuremath{\Xi}}}_{c}^{(\ensuremath{'})}{\overline{D}}^{(*)}$ molecular pentaquarks, which are a typical hidden-charm molecular pentaquark system with single strangeness.