Dispersive analysis of pion-nucleon scattering and the pion-nucleon sigma term

Ruiz de Elvira, Jacobo; Hoferichter, Martin; Kubis, Bastian; Meissner, Ulf-G. (20 March 2018). Dispersive analysis of pion-nucleon scattering and the pion-nucleon sigma term. PoS - proceedings of science. Trieste, Italy: Scuola Internazionale Superiore di Studi Avanzati SISSA 10.22323/1.310.0141

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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.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Ruiz de Elvira Carrascal, Jacobo and Hoferichter, Martin

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Aug 2018 16:08

Last Modified:

23 Oct 2019 15:35

Publisher DOI:

10.22323/1.310.0141

BORIS DOI:

10.7892/boris.119664

URI:

https://boris.unibe.ch/id/eprint/119664

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