Zuo-Yun Wang | Searcharxiv

arXiv2018

Newly observed $Ω(2012)$ state and strong decays of the low-lying $Ω$ excitations

Stimulated by the newly discovered $Ω(2012)$ resonance at Belle II, in this work we have studied the OZI allowed strong decays of the low-lying $1P$- and $1D$-wave $Ω$ baryons within the $^3P_0$ model. It is found that $Ω(2012)$ is most likely to be a $1P$-wave $Ω$ state with $J^P=3/2^-$. We also find that the $Ω(2250)$ state could be assigned as a $1D$-wave state with $J^P=5/2^+$. The other missing $1P$- and $1D$-wave $Ω$ baryons may have large potentials to be observed in their main decay channels.

hep-ph↗

arXiv2018

Strong decay of $Λ_c(2940)$ as a $2P$ state in the $Λ_c$ family

Considering the mass, parity and $D^0 p$ decay mode, we tentatively assign the $Λ_c(2940)$ as the $P-$wave states with one radial excitation. Then, via studying the strong decay behavior of the $Λ_c(2940)$ within the $^3P_0$ model, we obtain that the total decay widths of the $Λ_{c1}(\frac{1}{2}^-,2P)$ and $Λ_{c1}(\frac{3}{2}^-,2P)$ states are 16.27 MeV and 25.39 MeV, respectively. Compared with the experimental total width $27.7^{+8.2}_{-6.0}\pm0.9^{+5.2}_{-10.4}~\rm{MeV}$ measured by LHCb Collaboration, both assignments are allowed, and the $J^P=\frac{3}{2}^-$ assignment is more favorable. Other $λ-$mode $Σ_c(2P)$ states are also investigated, which are most likely to be narrow states and have good potential to be observed in future experiments.

hep-ph↗