Roy–Steiner-equation analysis of pion–nucleon scattering
Publisher DOI
Abstract
Low-energy pion–nucleon scattering is relevant 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 The- ory. In this talk, we show how the fruitful combination of dispersion-theoretical methods, in particular in the form of Roy–Steiner equations, with modern high-precision data on hadronic atoms allows one to determine the pion–nucleon scattering amplitudes at low energies with unprecedented accuracy. Special attention will be paid to the extraction of the pion–nucleon σ-term, and we discuss in detail the current tension with recent lattice results, as well as the determination of the low-energy constants of chiral perturbation theory.c
Date Issued
2017-03-22
Publication Type
Conference Item
Subject(s)
Language(s)
en
Author(s)
Meißner, U.-G. | |
Hoferichter, M. | |
Kubis, B. | |
Foka, Y. | |
Brambilla, N. | |
Kovalenko, V. |
Additional Credits
Journal
EPJ web of conferences
Publisher
EDP Sciences
ISSN
2100-014X
Title of Event
Access(Rights)
Unknown