Multiquark-Oriented QCD Sum Rules

TL;DR

This paper enhances the reliability of QCD sum rules for describing exotic multiquark hadrons by including all relevant contributions, demonstrated through the case of tetraquark states.

Contribution

It introduces a method to incorporate all potentially relevant contributions into QCD sum rules for multiquark states, improving their descriptive accuracy.

Findings

Increased factual reliability of multiquark hadron descriptions.

Application demonstrated for tetraquark states.

Framework allows more comprehensive inclusion of relevant contributions.

Abstract

We propose to increase the factual reliability of descriptions of exotic multiquark hadrons utilizing the approach to bound states of strongly interacting constituents known as QCD sum rules, by allowing exclusively all contributions that potentially bear some relevance for multiquark states to enter the correlation functions that form the main ingredient of this framework. The route to this goal is illustrated for the (presumably least involved) special case of tetraquark states.