轻的戈德斯通玻色子圈能否抵消反对技术色理论的“S参数论证”？
摘要
我们检验了具有轻的赝戈德斯通玻色子的单家族技术色理论的斜修正唯象学。基于技术色理论的规范手征拉格朗日量的圈计算，我们得出结论：尽管轻戈德斯通玻色子圈对在Z极点测得的S参数给出负贡献，但该效应不足以明确地反驳反对单家族技术色理论的“S参数论证”。这个结果不能先验地猜测，而必须明确计算。我们的分析涉及Peskin和Takeuchi的STU斜参数化的扩展版本。原则上，当圈中存在轻的新粒子时，必须使用这种扩展形式(STUVWX)。
关键词
引用
@article{arxiv.hep-ph/9504272,
title = {Can light Goldstone boson loops counter the `S-argument' against Technicolor?},
author = {Sean Fleming and Ivan Maksymyk},
journal= {arXiv preprint arXiv:hep-ph/9504272},
year = {2009}
}
备注
We have considerably shortened this paper. The bulk of the derivation of the $STUVWX$ formalism has been removed and will be presented elsewhere. More emphasis has been placed on the calculation of $STUVWX$ in a one-family Technicolor model with light psuedo-goldstone bosons. Though the result remains the same, the `S-argument' can not be countered, we have elucidated some interesting points in the calculation. In particular we emphasize the fact that it is not possible to tell from the outset what the calculated value of $S$ at the $Z$-pole will be