arXiv:2510.20488·v1·High Energy Physics — Phenomenology
On the Resonance Coupling and Width in Quantum Field Theory
Abstract
In quantum field theory, characteristics of resonances are related to self-energy diagrams, which are ultra-violet divergent and require renormalization. We demonstrate the proper way to define the resonance coupling such that the resonance properties calculated in quantum field theory are finite and scheme-independent quantities.
Comments: 5 pages