Speaker
Jacobo Ruiz de Elvira
(ITP, University of Bern)
Description
We review recent high-precision results for different nucleon matrix elements based on a dispersive low-energy pion-nucleon scattering amplitude analysis using Roy-Steiner equations.
In particular, we focus on the phenomenological determination of the pion-nucleon $\sigma$-term, derived in combination with modern precision data on pionic atoms. We also discuss recent applications to the isovector spectral functions of the nucleon electromagnetic form factors and the nucleon matrix elements of the antisymmetric quark tensor.
