We have investigated the electromagnetic form factors of charmed $\Lambda_c^+$ baryon and the total cross sections of the $𝑒^+𝑒^− \to 𝛬^+_c \bar{\Lambda}_c^-$ reaction within the extended vector meson dominance model. By including the charmonium-like states 𝜓(4500), 𝜓(4660), 𝜓(4790), and the possible 𝜓(4900) state, the current experimental data can be well reproduced.
In this presentation, I will show our recent results on calculating the gluon-exchange contribution to the $J/\Psi N$ scattering length via dispersion relations. Additionally, I will compare these results with others to facilitate further discussion.
We study the latest non-trivial resonant line-shape of $\eta(1405 /1475)$ in the $K \bar{K}\pi$ invariant mass spectrum measured by the BESIII. The possible existence of two isoscalar pseudoscalars around 1.4 ~1.5 GeV is in contradiction with the nonet structure in the SU(3) flavor symmetry. Nevertheless, the glueball assignment of the outnumbering state is not favored by the Lattice QCD...
In this work, we investigated in detail the widths of the $X_2$ decaying to $J/ \psi V$ ($V = \rho^0\,,\omega$) and to $\eta_cP$ ($P = \pi^0\,,\eta\,,\eta'$) using the effective Lagrangian approach. In calculations, we assume the $X_2$ as a molecular state of the $D^{*0}\bar{D}^{*0} $ and $D^{*+}D^{*-}$ with equal proportion. Moreover, we only consider the contributions from the triangle...
We study three-body systems \eta K^ \bar{K}^, \pi K^ \bar{K}^ and K K^ \bar{K}^ by Faddeev fixed-center approximation. Under fixed-center approximation framework, we can view a three-body system as a cluster which is generated by two particles in system and the third particle, where we view K^ \bar{K}^cluster as f_0(1710), a_0(1710) and f_2’(1525), respectively, and scatter \eta, \pi...
