Speaker
Jacobo Ruiz de Elvira
(HISKP, Bonn University)
Description
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.
Author
Jacobo Ruiz de Elvira
(HISKP, Bonn University)
Co-authors
Prof.
Bastian Kubis
(HISKP, Bonn)
Dr
Martin Hoferichter
(INT, Seattle)
Prof.
Ulf Meißner
(meissner@hiskp.uni-bonn.de)
