Two-body strong decays of the pseudoscalar hidden-charm tetraquark states via the QCD sum rules

TL;DR

This paper investigates the properties and decay widths of pseudoscalar hidden-charm tetraquark states using QCD sum rules, providing theoretical predictions for their total decay widths.

Contribution

It introduces a detailed QCD sum rule analysis of two-body strong decays for specific pseudoscalar hidden-charm tetraquarks, including vacuum condensates up to dimension 5.

Findings

Total decay width of Zc- is approximately 326 MeV.

Total decay width of Zc+ is approximately 92 MeV.

Hadronic coupling constants are calculated using QCD sum rules.

Abstract

In this work, we study the properties of the pseudoscalar hidden-charm tetraquark states by analyzing their two-body strong decays via the QCD sum rules based on rigorous quark-hadron duality. We take into account the vacuum condensates up to dimension 5 on the QCD side, and obtain the hadronic coupling constants. At last, we obtain the total decay widths $\Gamma(Z_{c}^{-}) = 326.20^{+4.26}_{-3.11}$ MeV and $\Gamma(Z_{c}^{+}) = 91.84^{+0.96}_{-0.76}$ MeV, respectively, where the $Z_{c}^{+}$($J^{PC}=0^{-+}$) and $Z_{c}^{-}$($J^{PC}=0^{--}$) denote the pseudoscalar hidden-charm tetraquarks with the diquark-antidiquark structures $[uc]_{A}[\bar{d}\bar{c}]_{V}-[uc]_{V}[\bar{d}\bar{c}]_{A}$ and $[uc]_{A}[\bar{d}\bar{c}]_{V}+[uc]_{V}[\bar{d}\bar{c}]_{A}$, respectively.