Isospin violation effects in the pion-nucleon sigma-term
A precision determination of the pion-nucleon sigma term requires the consideration of isospin-breaking corrections, given that such effects are enhanced due to the chiral suppression of the isoscalar pion-nucleon amplitude. In particular, when comparing phenomenological and lattice-QCD determinations, it is critical that consistent definitions be employed. In this contribution, we present an update on the determination of the sigma term from pion-nucleon scattering, focusing on the role of isospin violation.
Authors
- Jacobo Ruiz de Elvira (ORCID: https://orcid.org/0000-0001-6089-5617)
- Martin Hoferichter (ORCID: https://orcid.org/0000-0003-1113-9377)
- Ulf-G. Meißner (ORCID: https://orcid.org/0000-0003-1254-442X)
- Bastian Kubis (ORCID: https://orcid.org/0000-0002-1541-6581)
Publication Details
- Published
- 2025-10-24
- DOI
- https://doi.org/10.22323/1.483.0066
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen