A holographic model for the baryon octet

TL;DR

This paper introduces a holographic model for the baryon octet using nonlinear chiral symmetry, accurately predicting mass spectra and pion-nucleon couplings consistent with experimental data.

Contribution

It presents a novel holographic approach to baryon octet modeling that incorporates nonlinear chiral symmetry and derives pion-nucleon couplings.

Findings

Mass spectra align well with experimental data

Pion-nucleon couplings are derived and shown to be gauge-invariant

Only derivative couplings of pions to nucleons are present

Abstract

By adopting the nonlinear realization of chiral symmetry, a holographic model for the baryon octet is proposed. The mass spectra of the baryon octet and their low-lying excited states are calculated, which show good consistency with experiments. The couplings of pion to nucleons are derived in two gauges and are shown to be equivalent with each other. It also shows that only derivative couplings of pion to nucleons appear in this holographic model. The coupling constant is then calculated.