Work

Isospin violation effects in the pion-nucleon sigma-term

Year: 2025

Type: conference-paper

Abstract: 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.

DOI: 10.22323/1.483.0066

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

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen, H2020 European Research Council

Awards: Emergent Complexity from strong Interactions, G3712632836, Searching for physics beyond the standard model in low-energy precision observables

OpenAlex ID: W4415516634

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