Meißner, U.-G.; Ruiz de Elvira Carrascal, Jacobo; Hoferichter, M.; Kubis, B.; Foka, Y.; Brambilla, N.; Kovalenko, V. (22 March 2017). Roy–Steiner-equation analysis of pion–nucleon scattering. EPJ web of conferences, 137(01014), 01014. EDP Sciences 10.1051/epjconf/201713701014
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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
Item Type: |
Conference or Workshop Item (Paper) |
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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 |
Subjects: |
500 Science > 530 Physics |
ISSN: |
2100-014X |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
30 Oct 2017 10:00 |
Last Modified: |
05 Dec 2022 15:07 |
Publisher DOI: |
10.1051/epjconf/201713701014 |
BORIS DOI: |
10.7892/boris.106403 |
URI: |
https://boris.unibe.ch/id/eprint/106403 |
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