On the description of exotic hadron states within QCD sum rules

TL;DR

This paper emphasizes the importance of extending QCD sum-rule analyses beyond leading order to reliably describe exotic hadron states and their decay properties.

Contribution

It advocates for incorporating higher-order corrections in QCD sum rules to improve the accuracy of exotic hadron state descriptions.

Findings

Higher-order QCD corrections are essential for trustable decay width calculations.

Leading-order analyses are insufficient for reliable exotic hadron descriptions.

Enhanced QCD sum-rule methods can better match experimental observations.

Abstract

Revisiting the QCD sum-rule description of exotic hadron states, we argue that, in order to arrive at trustable analyses of, for instance, strong decay widths of multiquarks, it is inevitable to adopt the QCD sum-rule approach beyond the leading perturbative level.