Vertex operators for production of baryon resonances in nucleon-gamma collisions with preserving gauge invariance and analyticity
arXiv:1609.07002 · doi:10.1142/S0217751X16501931
Abstract
Vertex operators for photo- and electro-production of baryon states with arbitrary spin-parity, $ γ+ 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.
10 pages