Compositeness Condition and Propagator
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概要
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The elementary particle transits to the composite one in the limit that the scattering amplitude in the channel communicating with this particle reduces to its one-particle irreducible part. We investigate this limiting process paying special attention to the asymptotic behavior of the propagator of that particle. No approximation like the elastic one is made. It is found that Lehmann's representation of the propagator in the limit needs one subtraction if and only if the self-energy of the elementary particle is divergent. The method is exemplified in the elastic approximation.
- 理論物理学刊行会の論文
- 1967-07-25
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