$S$ wave hidden charm - hidden strangeness production in $e^+e^-$ annihilation

TL;DR

The paper proposes that an enhancement in $e^+e^-$ annihilation involving hidden charm and strangeness is due to S wave production of specific charmed strange meson pairs, suggesting a testable pattern of HQSS breaking.

Contribution

It introduces a mechanism linking observed enhancements to S wave production of particular meson pairs, highlighting a pattern of HQSS breaking in this energy region.

Findings

Enhancement linked to S wave production of $D_{s0}(2317) ar D_s^*$ and $D_{s1}^*(2460) ar D_s$.

Pattern of HQSS breaking predicted in specific final channels.

Testable predictions for channels like $ ext{}\eta_c(1S) ext{ }\phi$ and $h_c(1P) ext{ }\\eta$, $h_c(1P) ext{ }\\eta'$.

Abstract

It is suggested that the recently observed enhancement of the relative yield in $e^+e^-$ annihilation of states with hidden charm and hidden strangeness above 4.43\,GeV is associated with the $S$ wave production of the charmed strange meson pairs $D_{s0}(2317) \bar D_s^* + {\rm c.c.}$ and $D_{s1}^*(2460) \bar D_s+ {\rm c.c.}$. This mechanism implies a pattern of breaking of the Heavy Quark Spin Symmetry (HQSS) that can be tested in the final channels such as $\eta_c(1S) \phi$, $h_c(1P) \eta $, $h_c(1P) \eta' $ produced in the same energy range.