Forests, Groves and Higgs Bosons: Gauge Invariance Classes in Spontaneously Broken Gauge Theories

Details Forests, Groves and Higgs Bosons: Gauge Invariance Classes in Spontaneously Broken Gauge Theories Forests, Groves and Higgs Bosons: Gauge Invariance Classes in Spontaneously Broken Gauge Theories

2003-05-30

arxiv.org/abs/hep-ph/0305334v2

Eur.Phys.J. C30 (2003) 567-582

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX2e, 16 pages, 215 feynmp figures and style included, published version

Scientific paper

10.1140/epjc/s2003-01313-3

We determine the gauge invariance classes of tree level Feynman diagrams in spontaneously broken gauge theories, providing a proof for the formalism of gauge and flavor flips. We find new gauge invariance classes in theories with a nonlinearly realized scalar sector. In unitarity gauge, the same gauge invariance classes correspond to a decomposition of the scattering amplitude into pieces that satisfy the relevant Ward Identities individually. In theories with a linear realized scalar sector in R_\xi gauge, no additional nontrivial gauge invariance classes exist compared to the unbroken case.

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