Volume 483 - The XVIth Quark Confinement and the Hadron Spectrum Conference (QCHSC24) - Session B: Light Quarks
Isospin violation effects in the pion-nucleon sigma-term
M. Hoferichter*, J. Ruiz de Elvira, B. Kubis and U.G. Meißner
*: corresponding author
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Published on: October 27, 2025
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: https://doi.org/10.22323/1.483.0066
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