Scalar hidden-charm tetraquark states with QCD sum rules

TL;DR

This paper uses QCD sum rules to predict the masses and properties of scalar hidden-charm tetraquark states, providing theoretical insights for future experimental verification.

Contribution

It introduces a detailed QCD sum rule analysis of scalar hidden-charm tetraquarks considering vacuum condensates up to dimension-10, which is a novel comprehensive approach.

Findings

Predicted masses of scalar hidden-charm tetraquarks.

Discussion of possible decay channels.

Theoretical mass estimates for future experimental tests.

Abstract

In this article, we study the masses and pole residues of the pseudoscalar-diquark-pseudoscalar-antidiquark type and vector-diquark-vector-antidiquark type scalar hidden-charm $cu\bar{c}\bar{d}$ ($cu\bar{c}\bar{s}$) tetraquark states with QCD sum rules by taking into account the contributions of the vacuum condensates up to dimension-10 in the operator product expansion. The predicted masses can be confronted with the experimental data in the future. Possible decays of those tetraquark states are also discussed.