2020/10/28 by Jochem Kip, Kip, Jochem, Ronald Kleiss +1
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2010.14849
openalex publication_date 2020/10/28 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
A spontaneously broken SU(2) theory is the simplest generalization of the\nAbelian Higgs model, containing three equally massive vector bosons and a\nsingle Higgs scalar. A strictly diagrammatic proof is presented of the\ntree-level unitarity of this model in the unitary gauge, i.e. employing only\nphysical fields. A new Ward-like identity is used to show that the high-energy\nbehaviour of all amplitudes cannot be more than quadratic; the use of\ngenerating functions for all off-shell amplitudes then leads to the unitarity\nproof.\n