Work

Roy–Steiner equations for pion–nucleon scattering and nucleon resonances

Year: 2025

Type: conference-paper

Abstract: In these proceedings, we review the determination of the pion--nucleon scattering amplitude at low energies using Roy--Steiner equations. In particular, we focus on the phenomenological extraction of the pion--nucleon $\sigma$-term and address some of the most frequently asked questions regarding our analysis. We also discuss the determination of low-energy constants in chiral perturbation theory and examine the convergence of the chiral expansion. Finally, we present results for the nucleon resonance pole parameters.

Source: International Workshop on Chiral Dynamics (CD)

DOI: 10.22323/1.479.0004

Authors: Jacobo Ruiz de Elvira, Martin Hoferichter, Bastian Kubis, Ulf-G. Meißner

Institutions: Ruhr University Bochum, Universidad Complutense de Madrid, University of Bonn

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4410041389

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