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.

引用

页码：567 / 582

页数：16

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