Forests, groves and Higgs bosons |
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| Authors: | T Ohl C Schwinn |
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| Institution: | (1) Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany;(2) Institut für Kernphysik, Darmstadt University of Technology, Schloßgartenstr. 9, 64289 Darmstadt, Germany |
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| 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
gauge, no additional non-trivial gauge invariance classes exist compared to the unbroken case.Received: 2 June 2003, Revised: 21 July 2003, Published online: 5 September 2003 |
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