Bao-Jun Lai | Searcharxiv

arXiv2025

Non-$D\bar{D}$ Decays into Light Meson Pairs of the $D$-Wave Charmonium $ψ_3(3842)$

As a $D$-wave partner of $ψ(3770)$ identified by the LHCb Collaboration, $ψ_3(3842)$ lies between the $D\bar{D}$ and $D\bar{D^*}$ thresholds. Its non-$D\bar{D}$ decay channels have attracted considerable interest. In this study, we investigate these allowed non-$D\bar{D}$ decays of $ψ_3(3842)$ into $PP$, $PV$, and $VV$ final states using the hadronic loop mechanism, where $P$ and $V$ represent light pseudoscalar and vector mesons, respectively. Our results suggest that these non-$D\bar{D}$ decays of $ψ_3(3842)$ can be significant, with contributions primarily driven by hadronic loops. Notably, the $ρπ$ channel stands out as the main non-$D\bar{D}$ decay mode, while non-$D\bar{D}$ decay channels involving strange mesons are also sizable. These predictions could be tested in future experiments such as those at LHCb and BESIII.

hep-ph↗

arXiv2024

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 $Ξ_{c c} D^{(*)}$, $Ξ_{cc}D_{1}$, and $Ξ_{cc}D_{2}^{*}$ 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 $Ξ_{c c} D^{(*)}$, $Ξ_{cc}D_{1}$, and $Ξ_{cc}D_{2}^{*}$ 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 $Ξ_{c c} D^{(*)}$, $Ξ_{cc}D_{1}$, and $Ξ_{cc}D_{2}^{*}$ triple-charm molecular-type pentaquark candidates.

hep-ph↗