Investigating the M1 radiative decay behaviors and the magnetic moments of the predicted triple-charm molecular-type pentaquarks

In this work, we systematically study the electromagnetic properties including the M1 radiative decay widths and the magnetic moments of the isoscalar ₂ ₂ D^ (*), ₂₂D₁, and ₂₂D₂^* triple-charm molecular-type pentaquark candidates, where we adopt the constituent quark model and consider both the S-D wave mixing effect and the coupled channel effect. Our numerical results suggest that the M1 radiative decay widths and the magnetic moments of the isoscalar ₂ ₂ D^ (*), ₂₂D₁, and ₂₂D₂^* triple-charm molecular-type pentaquark candidates can reflect their inner structures, and the study of the electromagnetic properties is the important step to construct the family of the triple-charm molecular-type pentaquarks. With the accumulation of the experimental data during the high-luminosity phase of LHC, we expect that the present work combined with the corresponding mass spectrum information can encourage the experimental colleagues at LHCb to focus on the isoscalar ₂ ₂ D^ (*), ₂₂D₁, and ₂₂D₂^* triple-charm molecular-type pentaquark candidates.