Fully-strange tetraquark states with the exotic quantum numbers $J^{PC} = 0^{+-}$ and $2^{+-}$

TL;DR

This paper predicts the masses of fully-strange tetraquark states with exotic quantum numbers using QCD sum rules, suggesting specific decay channels for experimental searches.

Contribution

It constructs diquark-antidiquark currents for these states and applies QCD sum rules to estimate their masses and possible decay modes, a novel approach for these quantum numbers.

Findings

Mass of $0^{+-}$ state: approximately 2.45 GeV

Mass of $2^{+-}$ state: approximately 3.07 GeV

Suggested decay channels include P-wave $ o \phi(1020) f_0(1710)$ and $ o \phi K ar K$.

Abstract

We study the fully-strange tetraquark states with the exotic quantum numbers $J^{PC} = 0^{+-}$ and $2^{+-}$. We construct their corresponding diquark-antidiquark interpolating currents, and apply the QCD sum rule method to calculate both their diagonal and off-diagonal correlation functions. The obtained results are used to construct some mixing currents that are nearly non-correlated, from which we extract the masses of the lowest-lying states to be $M_{0^{+-}} = 2.45^{+0.33}_{-0.44}$ GeV and $M_{2^{+-}} = 3.07^{+0.25}_{-0.33}$ GeV. We apply the Fierz rearrangement to transform the diquark-antidiquark currents to be the combinations of meson-meson currents, and the obtained Fierz identities indicate that these two states may be searched for in the $P$-wave $\phi(1020) f_0(1710)/\phi(1020) f_2^\prime(1525) (\to \phi K \bar K / \phi \pi \pi)$ channels.