Results on the Analyticity of Many‐Body Scattering Amplitudes in Perturbation Theory
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چکیده
منابع مشابه
Results on the Analyticity of Many - Body Scattering Amplitudes in Perturbation Theory
The problem of analytic continuation of the many-body scattering amplitude associated with a perturbation-theory diagram under the rotation of the final momenta from real to complex momenta, k -.. (1 + iO)k, is studied. It is shown that the contour of integration over internal momenta can be distorted avoiding singularities of the integrand, as 0 varies for small enough O. If the diagram is con...
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ژورنال
عنوان ژورنال: Journal of Mathematical Physics
سال: 1967
ISSN: 0022-2488,1089-7658
DOI: 10.1063/1.1705174