Predictions of charged charmonium-like structures with hidden-charm and open-strange channels

TL;DR

This paper introduces a new mechanism to predict charged charmonium-like structures arising from hidden-charm and open-strange decay channels, with potential observability in future experiments.

Contribution

It proposes the initial single chiral particle emission mechanism to study hidden-charm di-kaon decays and predicts charged structures near specific meson thresholds.

Findings

Enhancement structures near $Dar{D}_s^*$ and $D^*ar{D}_s^*$ thresholds.

Predicted charged charmonium-like states accessible in future experiments.

Line shape analysis of $J/ar{J} K^+$ invariant mass spectrum.

Abstract

We propose the initial single chiral particle emission mechanism, with which the hidden-charm di-kaon decays of higher charmonia and charmonium-like states are studied. Calculating the distributions of differential decay width, we obtain the line shape of the $J/\psi K^+$ invariant mass spectrum of $\psi_i\to J/\psi K^+K^-$, where $\psi_i=\psi(4415), Y(4660)$, and $\psi(4790)$. Our numerical results show that there exist enhancement structures with both hidden-charm and open-strange decays, which are near the $D\bar{D}_s^*/D^*\bar{D}_s$ and $D^*\bar{D}_s^*/\bar{D}^*{D}_s^*$ thresholds. These charged charmonium-like structures predicted in this Letter can be accessible in future experiments, especially BESIII, BelleII, and SuperB.