In-medium isovector πN amplitude from low-energy pion scattering

E. Friedman; M. Bauer; J. Breitschopf; H. Clement; H. Denz; E. Doroshkevich; A. Erhardt; G. J. Hofman; R. Meier; G. J. Wagner; G. Yaari

doi:10.1103/PhysRevLett.93.122302

In-medium isovector πN amplitude from low-energy pion scattering

E. Friedman^*, M. Bauer, J. Breitschopf, H. Clement, H. Denz, E. Doroshkevich, A. Erhardt, G. J. Hofman, R. Meier, G. J. Wagner, G. Yaari

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Various differential cross sections for elastic scattering of 21.5 MeV positive and negative pions by Si, Ca, Ni, and Zr were investigated using pion-nucleus (πN) potential across the threshold. The 'anomalous' repulsion in the s-wave term was also observed. The extra repulsion was described in terms of a chiral-motivated model where the pion decay constant is modified in the medium. The results show that with the inclusion of chiral-motivated model, it is possible to reconcile the pion-nucleus interaction with free pion-nucleon interaction, removing the anomaly in isovector channel.

Original language	English
Article number	122302
Pages (from-to)	122302-1-122302-4
Journal	Physical Review Letters
Volume	93
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.93.122302
State	Published - 17 Sep 2004

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title = "In-medium isovector πN amplitude from low-energy pion scattering",

abstract = "Various differential cross sections for elastic scattering of 21.5 MeV positive and negative pions by Si, Ca, Ni, and Zr were investigated using pion-nucleus (πN) potential across the threshold. The 'anomalous' repulsion in the s-wave term was also observed. The extra repulsion was described in terms of a chiral-motivated model where the pion decay constant is modified in the medium. The results show that with the inclusion of chiral-motivated model, it is possible to reconcile the pion-nucleus interaction with free pion-nucleon interaction, removing the anomaly in isovector channel.",

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T1 - In-medium isovector πN amplitude from low-energy pion scattering

AU - Friedman, E.

AU - Bauer, M.

AU - Breitschopf, J.

AU - Clement, H.

AU - Denz, H.

AU - Doroshkevich, E.

AU - Erhardt, A.

AU - Hofman, G. J.

AU - Meier, R.

AU - Wagner, G. J.

AU - Yaari, G.

PY - 2004/9/17

Y1 - 2004/9/17

N2 - Various differential cross sections for elastic scattering of 21.5 MeV positive and negative pions by Si, Ca, Ni, and Zr were investigated using pion-nucleus (πN) potential across the threshold. The 'anomalous' repulsion in the s-wave term was also observed. The extra repulsion was described in terms of a chiral-motivated model where the pion decay constant is modified in the medium. The results show that with the inclusion of chiral-motivated model, it is possible to reconcile the pion-nucleus interaction with free pion-nucleon interaction, removing the anomaly in isovector channel.

AB - Various differential cross sections for elastic scattering of 21.5 MeV positive and negative pions by Si, Ca, Ni, and Zr were investigated using pion-nucleus (πN) potential across the threshold. The 'anomalous' repulsion in the s-wave term was also observed. The extra repulsion was described in terms of a chiral-motivated model where the pion decay constant is modified in the medium. The results show that with the inclusion of chiral-motivated model, it is possible to reconcile the pion-nucleus interaction with free pion-nucleon interaction, removing the anomaly in isovector channel.

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In-medium isovector πN amplitude from low-energy pion scattering

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