Actions for Gauge invariance and Compton scattering from relativistic composite systems [electronic resource].

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Gauge invariance and Compton scattering from relativistic composite systems [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
31 pages : digital, PDF file
Additional Creators
Continuous Electron Beam Accelerator Facility, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Using the Ward-Takahashi (W-T) identity and the Bethe-Salpeter (B-S) wave equation, we investigate the dynamical requirements imposed by electromagnetic gauge invariance on Compton scattering from relativistic composite system. The importance of off-shell rescattering in intermediate states, which is equivalent to final state interactions in inclusive processes, is clarified in the context of current conservation. It is shown that, if the nuclear force is nonlocal, there will be both two-photon interaction currents and rescattering contributions to terms involving one-photon interaction currents. We derive the two-body W-T identity for the two-photon interaction currents, and obtain explicit forms for the interaction current operators for three illustrative models of nuclear forces: (a) two-pion exchange forces with baryon resonances, (b) covariant separable forces, and (c) charged one-pion exchange.
Report Numbers
E 1.99:doe/er/40150--239
E 1.99: wm--93-103
E 1.99: cebaf-th--93-10
cebaf-th--93-10
wm--93-103
doe/er/40150--239
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Other Subject(s)
Note
Published through SciTech Connect.
09/01/1993.
"doe/er/40150--239"
" wm--93-103"
" cebaf-th--93-10"
"DE93040858"
Gross, F.; Ito, H.
Type of Report and Period Covered Note
Topical; 12/31/1993 - 12/31/1993
Funding Information
AC05-84ER40150
View MARC record | catkey: 14713866