GAUGE-INVARIANT 3-BOSON VERTICES AND THEIR WARD IDENTITIES IN THE STANDARD MODEL

被引:24
作者
PAPAVASSILIOU, J
PHILIPPIDES, K
机构
[1] Department of Physics, New York University, Andre and Bella Meyer Hall of Physics, New York, NY 10003
来源
PHYSICAL REVIEW D | 1995年 / 52卷 / 04期
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevD.52.2355
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In the context of the standard model we extend the S-matrix pinch technique for nonconserved currents to the case of three-boson vertices. We outline in detail how effective gauge-invariant three-boson vertices can be constructed, with an three incoming momenta off shell. Explicit closed expressions for the vertices gamma W-W+, ZW(-)W(+), and chi W-W+ are reported. The three-boson vertices so constructed satisfy naive QED-like Ward identities which relate them to the gauge-invariant gauge boson self-energies previously constructed by the same method. The derivation of the aforementioned Ward identities relies on the sob requirement of complete gauge invariance of the S-matrix element considered; in particular, no knowledge of the explicit closed form of the three-boson vertices involved is necessary. The validity of one of these Ward identities is demonstrated explicitly; through a detailed diagrammatic one-loop analysis, in the context of three different gauges.
引用
收藏
页码:2355 / 2378
页数:24
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