Abstract
The phenomenology of pionic atoms is reviewed, highlighting the extraction of the πN σ term from a large-scale fit of strong-interaction level shift and width data across the periodic table. The value thus derived σπN = 57 ± 7 MeV is linked directly to the relatively well known πN isovector scattering amplitude near threshold. It compares well with the value 58 ± 5 MeV derived recently by the Bern-Bonn-Jülich group using Roy-Steiner equations to control the extrapolation of the πN isoscalar scattering amplitude from near threshold to zero pion mass.
Original language | English |
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Title of host publication | Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon |
Editors | Curtis Meyer, Reinhard A. Schumacher |
Publisher | American Institute of Physics Inc. |
ISBN (Electronic) | 9780735420083 |
DOIs | |
State | Published - 27 Jul 2020 |
Event | 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 - Pittsburgh, United States Duration: 2 Jun 2019 → 7 Jun 2019 |
Publication series
Name | AIP Conference Proceedings |
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Volume | 2249 |
ISSN (Print) | 0094-243X |
ISSN (Electronic) | 1551-7616 |
Conference
Conference | 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 |
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Country/Territory | United States |
City | Pittsburgh |
Period | 2/06/19 → 7/06/19 |
Bibliographical note
Publisher Copyright:© 2020 Author(s).