Chiral Low-Energy Constants: Status and Prospects

TL;DR

This paper reviews the current understanding of chiral low-energy constants, emphasizing their importance in low-energy QCD phenomenology and their role in guiding the development of dual theories of QCD.

Contribution

It provides a concise overview of the status of chiral low-energy constants and discusses prospects for future research in this area.

Findings

Current knowledge of LECs is crucial for low-energy hadronic predictions.

LECs offer insights into the short-distance dynamics of QCD.

Understanding LECs aids in constructing dual theories of QCD.

Abstract

Chiral low-energy constants (LECs) carry the information of short-distance dynamics involving heavier degrees of freedom not present in the chiral Lagrangian. Our knowledge of the LECs is all-important at phenomenological level because their relevance in the prediction of hadronic observables at low-energies and on the other side because they provide hints on the construction of a dual theory of QCD in the low-energy regime. I review briefly the status of these important couplings.