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

2016/09/22 by A. V. Anisovich, V. V. Anisovich, A. V. Sarantsev
Physics and Astronomy · #Baryon #Feynman graph #Gauge (firearms) #Gauge theory #High-Energy Particle Collisions Research #Production (economics) #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Vertex (graph theory) #Vertex function #hep-ph

paper · pdf · doi:10.1142/s0217751x16501931

10 pages

arxiv created 2016/09/22 · openalex publication_date 2016/12/18 · arxiv updated 2017/01/04 · openalex created_date 2017/01/06 · openalex updated_date 2026/08/05

Abstract

Vertex operators for photo- and electro-production of baryon states with arbitrary spin-parity, [Formula: see text], 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.

Citations

• Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
• Photoproduction of η -mesons off neutrons from a deuteron target
• Photoproduction of baryons decaying into Nπ and Nη
• High-statistics study of the reaction γp → p2π0
• Description of composite systems in the spectral integration technique: The gauge invariance and analyticity constraints for the radiative decay amplitudes