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Media type:
Electronic Conference Proceeding
Title:
Dispersive analysis of pion-nucleon scattering and the pion-nucleon sigma term
Contributor:
Ruiz de Elvira, Jacobo
[Author];
Hoferichter, Martin
[Author];
Kubis, Bastian
[Author];
Meissner, Ulf-G.
[Author]
imprint:
Sissa Medialab Trieste, Italy, 2018
Published in:Sissa Medialab Trieste, Italy 141 pp. (2018). doi:10.22323/1.310.0141 ; Proceedings of XVII International Conference on Hadron Spectroscopy and Structure — PoS(Hadron2017) - Sissa Medialab Trieste, Italy, 2018. - ISBN - doi:10.22323/1.310.0141 ; Proceedings of XVII International Conference on Hadron Spectroscopy and Structure — PoS(Hadron2017) - Sissa Medialab Trieste, Italy, 2018. - ISBN - doi:10.22323/1.310.0141 XVII International Conference on Hadron Spectroscopy and Structure, University of Salamanca, Salamanca, 2017-09-27 - 2017-09-29
Language:
English
DOI:
https://doi.org/10.22323/1.310.0141
Origination:
Footnote:
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Description:
Pion--nucleon scattering is one of the most fundamental processes in nuclear and hadronic physics, with applications that range 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.In this talk, we show how the fruitful combination of dispersion-theoretical methods with modern high-precision data of hadronic atoms allows for a determination of pion--nucleon scattering amplitudes at low energies with an unprecedented accuracy. Special attention will be paid to the extraction of the pion--nucleon σ-term, discussing in detail the current tension with recent lattice results, the determination of the pion--pion continuum in the electromagnetic nucleon form factors, and the determination of the low-energy constants of chiral perturbation theory.