Determination of the pion-nucleon σ term from pionic atoms

Eliahu Friedman; Avraham Gal

doi:10.1063/5.0008577

Determination of the pion-nucleon σ term from pionic atoms

Eliahu Friedman
, Avraham Gal^*

^*Corresponding author for this work

Racah Institute of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

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 σπ_N = 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
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	https://doi.org/10.1063/5.0008577
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
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
Country/Territory	United States
City	Pittsburgh
Period	2/06/19 → 7/06/19

Bibliographical note

Publisher Copyright:
© 2020 Author(s).

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10.1063/5.0008577

Cite this

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title = "Determination of the pion-nucleon σ term from pionic atoms",

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-J{\"u}lich group using Roy-Steiner equations to control the extrapolation of the πN isoscalar scattering amplitude from near threshold to zero pion mass.",

author = "Eliahu Friedman and Avraham Gal",

note = "Publisher Copyright: {\textcopyright} 2020 Author(s).; 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 ; Conference date: 02-06-2019 Through 07-06-2019",

year = "2020",

month = jul,

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doi = "10.1063/5.0008577",

language = "אנגלית",

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Friedman, E & Gal, A 2020, Determination of the pion-nucleon σ term from pionic atoms. in C Meyer & RA Schumacher (eds), Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon., 030015, AIP Conference Proceedings, vol. 2249, American Institute of Physics Inc., 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019, Pittsburgh, United States, 2/06/19. https://doi.org/10.1063/5.0008577

Determination of the pion-nucleon σ term from pionic atoms. / Friedman, Eliahu ; Gal, Avraham.
Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon. ed. / Curtis Meyer; Reinhard A. Schumacher. American Institute of Physics Inc., 2020. 030015 (AIP Conference Proceedings; Vol. 2249).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Gal, Avraham

PY - 2020/7/27

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N2 - 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.

AB - 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.

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PB - American Institute of Physics Inc.

T2 - 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019

Y2 - 2 June 2019 through 7 June 2019

ER -

Determination of the pion-nucleon σ term from pionic atoms

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