Systematic few-body analysis of ηd, η He 3, and η He 4 interaction at low energies SYSTEMATIC FEW-BODY ANALYSIS of ηd, ⋯ A. FIX and O. KOLESNIKOV

Abstract

The Alt-Grassberger-Sandhas N-body theory is used to study interaction of η mesons with d, He3, and He4. Separable expansion of the subamplitudes is adopted to convert the integral equations into the quasi-two-body form. The resulting formalism is applied to fit the existing data for low-energy η production of few-nucleon targets. On the basis of this fitting procedure the scattering lengths aηd, aηHe3, aηHe4 as well as the subthreshold behavior of the elementary ηN scattering amplitude are obtained.

Original language	English
Article number	044001
Journal	Physical Review C
Volume	97
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.97.044001
Publication status	Published - 13 Apr 2018

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.97.044001

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title = "Systematic few-body analysis of ηd, η He 3, and η He 4 interaction at low energies SYSTEMATIC FEW-BODY ANALYSIS of ηd, ⋯ A. FIX and O. KOLESNIKOV",

abstract = "The Alt-Grassberger-Sandhas N-body theory is used to study interaction of η mesons with d, He3, and He4. Separable expansion of the subamplitudes is adopted to convert the integral equations into the quasi-two-body form. The resulting formalism is applied to fit the existing data for low-energy η production of few-nucleon targets. On the basis of this fitting procedure the scattering lengths aηd, aηHe3, aηHe4 as well as the subthreshold behavior of the elementary ηN scattering amplitude are obtained.",

author = "A. Fix and O. Kolesnikov",

year = "2018",

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day = "13",

doi = "10.1103/PhysRevC.97.044001",

language = "English",

volume = "97",

journal = "Physical Review C",

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AU - Kolesnikov, O.

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AB - The Alt-Grassberger-Sandhas N-body theory is used to study interaction of η mesons with d, He3, and He4. Separable expansion of the subamplitudes is adopted to convert the integral equations into the quasi-two-body form. The resulting formalism is applied to fit the existing data for low-energy η production of few-nucleon targets. On the basis of this fitting procedure the scattering lengths aηd, aηHe3, aηHe4 as well as the subthreshold behavior of the elementary ηN scattering amplitude are obtained.

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