August 28, 2016 to September 4, 2016
Europe/Athens timezone

Roy-Steiner-equation analysis of pion-nucleon scattering

Aug 29, 2016, 5:30 PM
Amfitrion II (Makedonia Palace)

Amfitrion II

Makedonia Palace

Section B: Light Quarks Section B


Jacobo Ruiz de Elvira (HISKP, Bonn University)


A precise understanding of low-energy pion-nucleon interactions is central for many areas in nuclear and hadronic physics, ranging from the scalar couplings of the nucleon to the long-range part of two-pion-exchange potentials and three-nucleon forces in Chiral Effective Field Theory. We present a calculation that combines the general principles of analyticity, unitarity, and crossing symmetry with modern high-precision data of hadronic atoms, leading to a phenomenological description of the pion-nucleon amplitude with unprecedented rigor and accuracy. Consequences for the pion-nucleon sigma-term and the matching to Chiral Perturbation Theory will be discussed.

Primary author

Jacobo Ruiz de Elvira (HISKP, Bonn University)


Prof. Bastian Kubis (HISKP, Bonn) Dr Martin Hoferichter (INT, Seattle) Prof. Ulf Meißner (

Presentation materials