Electromagnetic transition form factors of the Roper resonance in baryon chiral perturbation theory

TL;DR

This paper uses baryon chiral perturbation theory to analyze the electromagnetic transition form factors of the Roper resonance, fitting free parameters due to limited experimental data and comparing results with theoretical models.

Contribution

It introduces a novel effective field theory approach including the Roper resonance as an explicit degree of freedom for studying electromagnetic form factors.

Findings

Fitted coupling constants to available data.

Predicted form factors consistent with some theoretical models.

Provided insights into Roper resonance structure.

Abstract

We consider the electromagnetic transition form factors of the Roper resonance in the framework of an effective field theory of pions, nucleons and delta and Roper resonances as explicit degrees of freedom. Due to the lack experimental data in the region of applicability of low energy effective field theory we fit available free coupling constants and compare obtained results compare to the predictions of a theoretical model.