Baryon chiral perturbation theory

TL;DR

This paper introduces baryon chiral perturbation theory, focusing on power-counting issues, Lorentz-invariant formulations, and applications like nucleon mass expansion and form factor calculations.

Contribution

It discusses recent advances in Lorentz-invariant baryon chiral perturbation theory and applies it to nucleon properties and form factors.

Findings

Analysis of nucleon mass chiral expansion and convergence

Calculations of electromagnetic form factors

Calculations of axial form factors

Abstract

We provide an introduction to the power-counting issue in baryon chiral perturbation theory and discuss some recent developments in the manifestly Lorentz-invariant formulation of the one-nucleon sector. As explicit applications we consider the chiral expansion of the nucleon mass, its convergence properties, and calculations of the electromagnetic and axial form factors of the nucleon.