# BChPT$\times 1/{\rm N_c}$ in SU(3): a more effective theory

## TL;DR

This paper combines chiral and 1/N_c expansions to improve the effective theory of low energy baryons, especially in SU(3), by eliminating large inconsistent terms and aligning better with large N_c limits.

## Contribution

It introduces a combined chiral and 1/N_c expansion framework that enhances the theoretical description of baryons, particularly in SU(3), improving consistency and predictive power.

## Key findings

- Better behaved expansion eliminating large inconsistent terms
- Improved agreement with lattice QCD results
- Enhanced description of vector charges and axial couplings

## Abstract

The chiral and $1/N_c$ expansions are combined in the description of low energy baryons. The combination furnishes a better behaved expansion, consequence of exactly eliminating large terms that violate the $1/N_c$ expansion and which are typical of formulations of BChPT where consistency with the large $N_c$ limit is disregarded. The improvements are particularly dramatic in the case of SU(3). The general framework is outlined and applications to the vector charges and axial couplings are presented along with a comparison with Lattice QCD results with three quark flavors.