Advances in QCD sum rule calculations

TL;DR

This paper reviews recent progress in QCD sum rule techniques, focusing on new algorithms for parameter extraction, form factors at high momentum, and exotic tetraquark hadron properties.

Contribution

It introduces novel algorithms for analyzing correlators, enhancing the extraction of hadron parameters and properties of exotic states.

Findings

Improved algorithms for ground-state parameter extraction.

Enhanced methods for calculating form factors at high momentum.

Insights into the properties of tetraquark hadrons.

Abstract

We review the recent progress in the applications of QCD sum rules to hadron properties with the emphasis on the following selected problems: (i) development of new algorithms for the extraction of ground-state parameters from two-point correlators; (ii) form factors at large momentum transfers from three-point vacuum correlation functions; (iii) properties of exotic tetraquark hadrons from correlation functions of four-quark currents.