Roy–Steiner-equation analysis of pion–nucleon scattering

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)

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:

08 May 2018 08:58

Publisher DOI:

10.1051/epjconf/201713701014

BORIS DOI:

10.7892/boris.106403

URI:

https://boris.unibe.ch/id/eprint/106403

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