Investigating $Z_{cs}(3985)$ and $Z_{cs}(4000)$ exotic states in ${\Lambda }_b\to Z_{cs}^{-}p$ decays

Abstract

We study the $Z_{cs}(3985)$ and $Z_{cs}(4000)$ exotic states in the decays of ${\Lambda }_b$ baryons through a molecular scenario. In the final state interaction, the ${\Lambda }_b\to {\Lambda }_c^{+}{D}_s^{(\ast )-}$ decays are followed by the ${\Lambda }_c^{+}{D}_s^{(\ast )-}$ to $Z_{cs}^{-}p$ rescatterings via exchange of a $D^{(\ast )}$ meson. We predict a branching fraction of $(3.1_{-2.6}^{+1.4})\times 10^{-4}$ for ${\Lambda }_b\to Z_{cs}^{-}p$, which can be measured in the ${\Lambda }_b\to J/\psi K^{(\ast )-}p$ decay. This study proposes a new approach to test the molecular model, and guides future experimental searches for the $Z_{cs}(3985)$ and $Z_{cs}(4000)$.

13 pages, 3 figures

References in corpus (7)

• An updated review of the new hadron states
• The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
• About the exotic structure of $Z_{cs}$
• Resonant $a_0(980)$ state in triangle rescattering $D_s^{+}\to {\pi }^{+}{\pi }^0\eta$ decays
• The strange partner of the $Z_c$ structures in a coupled-channels model
• Implications of the $Z_{cs}(3985)$ and $Z_{cs}(4000)$ as two different states
• Searching for tetraquark through weak decays of b-baryons