Hidden-Strangeness Tetraquarks in the Dynamical Diquark Model

TL;DR

This paper extends the dynamical diquark model to hidden-strange tetraquarks, predicting their spectra and aiding experimental identification of exotic mesons around 2 GeV.

Contribution

It applies the dynamical diquark model to hidden-strange states, providing mass predictions and spectral diagnostics for future experimental searches.

Findings

Predicted spectra for hidden-strange tetraquarks near 2 GeV.

Identified potential candidates like $\,phi(2170)$ and $f_2(2340)$.

Provided tools for experimental differentiation of tetraquark states.

Abstract

The dynamical diquark model describes multiquark exotic hadrons in terms of diquark components nucleated by heavy quarks, and successfully explains multiple features of hidden-charm and -bottom exotics. Here we apply the model to the marginally heavy case of hidden-strange states to probe whether mesons near 2 GeV with peculiar properties, such as $\phi(2170)$, $f_2(2340)$, and X(2370), are possible tetraquark candidates. We calculate spin-multiplet average masses using potentials obtained through lattice simulations and quark models, and we also describe the detailed spectra of the expected multiplets as a diagnostic to discern the nature of future hadrons likely to be discovered in this mass region by experiments at facilities such as BESIII, JLab, and the EIC.