Journal Article

PreJuSER-28821

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Radiative pion capture by a nucleon

Fearing, H. W.FZJ* ; Hemmert, T. R. ; Lewis, R. ; Unkmeir, C.

2000
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/2381  doi:10.1103/PhysRevC.62.054006

Abstract: The differential cross sections for pi (-)p-->gamman and pi (+)n-->gammap are computed up to O(p(3)) in heavy baryon chiral perturbation theory (HBChPT). The expressions at O(p) and O(p(2)) have no free parameters. There are three unknown parameters at O(p(3)), low energy constants of the HBChPT Lagrangian, which are determined by fitting to experimental data. Two acceptable fits are obtained, which can be separated by comparing with earlier dispersion relation calculations of the inverse process. Expressions for the multipoles, with emphasis on the p-wave multipoles, are obtained and evaluated at threshold. Generally the results obtained from the best of the two fits are in good agreement with the dispersion relation predictions.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Kernphysik (IKP)

Research Program(s):

1. Theoretische Kernphysik (20.80.0)

Appears in the scientific report 2000
Notes: This version is available at the following Publisher URL: http://prc.aps.org

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