Electronic Resource
Springer
The European physical journal
30 (2003), S. 567-582
ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. 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 linearly realized scalar sector in $R_\xi$ gauge, no additional non-trivial gauge invariance classes exist compared to the unbroken case.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjc/s2003-01313-3
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