Vertex operators for production of baryon resonances in nucleon-gamma collisions with preserving gauge invariance and analyticity

A.V. Anisovich; A.V. Sarantsev; V.V. Anisovich

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Vertex operators for production of baryon resonances in nucleon-gamma collisions with preserving gauge invariance and analyticity

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arxiv 1609.07002 v1 pith:FBGS7N6M submitted 2016-09-22 hep-ph

A.V. Anisovich , V.V. Anisovich , A.V. Sarantsev This is my paper

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keywords analyticityoperatorsvertexbaryongaugeinvariancearbitrarycollisions

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abstract

Vertex operators for photo- and electro-production of baryon states with arbitrary spin-parity, $ \gamma + N\to B(J^P)$, are constructed. The operators obey gauge invariance and analyticity constraints. Analyticity is realized as a requirement of the generalized Siegert theorem for vertex form factors.

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