Applications of baryon chiral perturbation theory. A topical example: The nucleon sigma terms

TL;DR

This paper reviews modern baryon chiral perturbation theory approaches, focusing on nucleon sigma terms, demonstrating how these methods effectively extract nucleon structure information from experiments and lattice QCD.

Contribution

It highlights recent advances in baryon chiral perturbation theory, especially Lorentz covariant schemes and decuplet resonance effects, applied to nucleon sigma terms.

Findings

Reliable extraction of nucleon sigma terms from experimental data

Effective use of chiral perturbation theory with SU(2) and SU(3) frameworks

Enhanced understanding of nucleon structure through lattice QCD

Abstract

We present an overview of modern approaches to low-energy baryon structure based on baryon chiral perturbation theory. These are driven by the emergence of Lorentz covariant schemes and the systematic consideration of the effects of the lowest-lying decuplet resonances. In order to illustrate the progress recently achieved in this field, we present the last developments on our understanding of the nucleon sigma terms along these lines. In particular, we will show how these methods, in SU(2) or SU(3) settings, are reliable tools to process and maximize the information on the physical structure of the nucleon one can obtain from either experimental data or lattice QCD results.