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Forests, groves and Higgs bosonsGauge invariance classes in spontaneously broken gauge theories
被引：0
作者：
T. Ohl
C. Schwinn
机构：
[1] Universität Würzburg,Institut für Theoretische Physik und Astrophysik
[2] Am Hubland,Institut für Kernphysik
[3] Darmstadt University of Technology,undefined
来源：
The European Physical Journal C - Particles and Fields
|
2003年
/
30卷
关键词：
Gauge Theory;
Tree Level;
Feynman Diagram;
Gauge Invariance;
Ward Identity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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 \documentclass[12pt]{minimal}
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\begin{document}$R_\xi$\end{document} gauge, no additional non-trivial gauge invariance classes exist compared to the unbroken case.
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页码：567 / 582
页数：15
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