Forests, groves and Higgs bosons - Gauge invariance classes in spontaneously broken gauge theories

被引：3
|
作者：
Ohl, T [1 ]
Schwinn, C
机构：
[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
[2] TH Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
来源：
EUROPEAN PHYSICAL JOURNAL C | 2003年 / 30卷 / 04期
关键词：
D O I：
10.1140/epjc/s2003-01313-3
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
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 R-xi gauge, no additional non-trivial gauge invariance classes exist compared to the unbroken case.
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页码：567 / 582
页数：16
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