$Z_{cs}(3985)^-$: a strange hidden-charm tetraquark resonance or not?

TL;DR

This study investigates whether the recently observed $Z_{cs}(3985)^-$ can be interpreted as a resonance in certain $D^{(*)}D_s^*$ interactions, using a one-boson-exchange model and coupled channel analysis.

Contribution

The paper provides a dynamical analysis of $D^{(*)}D_s^*$ interactions, excluding the $Z_{cs}(3985)^-$ as a resonance in these channels based on phase shift calculations.

Findings

Excludes $Z_{cs}(3985)^-$ as a $D^{*0}D_s^-$ or similar resonance.

Uses a coupled channel one-boson-exchange model for analysis.

Provides phase shift results for relevant channels.

Abstract

Inspired by the newly $Z_{cs}(3985)^-$ reported by the BESIII Collaboration in the $K^+$ recoil-mass spectrum of the of $e^+e^-\to (D^{*0}D_s^-/D^0D_s^{*-})K^+$ processes, we perform a dynamical study on the $D^{(*)0}D_s^{*-}$ interactions by adopting a one-boson-exchange model and considering the coupled channel effect. After producing the phase shifts for all the discussed channels, our results exclude the newly $Z_{cs}(3985)^-$ as a $D^{*0}D_s^{-}/D^{0}D_s^{*-}/D^{*0}D_s^{*-}$ resonance with $I(J^P)=1/2(1^+, 0^-, 1^-, 2^-)$.