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Dynamical Electroweak Symmetry Breaking

动态电弱对称性破缺

基本信息

批准号：
05640339
负责人：
YAMAWAKI Koichi
金额：
$ 1.28万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

One of the biggest problem of the modern particle theory is to understand the nature of the Higgs boson which is expected to be reponsible for the origin of mass of everything. The purpose of this research was to give a dynamical explanation of the Higgs boson as a composite particle.We studied various aspects of composite Higgs models, mainly the top quark condensate, from two sides :1) High energy approach based on the underlying microscopic theory,2) Low energy approach based on the macroscopic effective field theory written in terms of the composite fields.In the former approach, we gave a final proof of the "renormalizability of the gauged Nambu-Jona-Lasinio model" which was suggested by our previous works. This fact was further used to modify the top quark condensate so as to bring the top mass prediciton somewhat lower than the original prediciton in accord with the experiment. Also we found new phase structure and nontriviality of the gauged strongly-coupled Yukawa model.As to the latter approach, we proved lowenergy theorem of the hidden local symmetry at any loop order as an extension of our previous work to initiate the effective field theory formulation at one loop of the nonlinear sigma model having a hidden local symmetry.Also we found a peculiar behavior of the zero mode of the Nambu-Goldstone boson in the light-front quantization which recently attracted much interest in the context of nonperturbative solution of the field theories.

现代粒子理论的最大问题之一是理解希格斯玻色子的本质，希格斯玻色子被认为是万物质量的起源。本研究的目的是给出希格斯玻色子作为复合粒子的动力学解释。我们从两个方面研究了复合希格斯模型的各个方面，主要是顶夸克凝聚体：1）基于底层微观理论的高能方法，2）基于复合场的宏观有效场理论的低能方法。在前一种方法中，我们给出了“重正化性”的最终证明测量的 Nambu-Jona-Lasinio 模型”，这是我们之前的作品所建议的。这一事实被进一步用来修改顶夸克凝聚体，以使顶质量预测比实验中的原始预测稍低。我们还发现了规范强耦合 Yukawa 模型的新相结构和非平凡性。对于后一种方法，我们证明了任何循环阶次的隐藏局部对称性的低能定理，作为我们之前工作的扩展，以在具有隐藏局部对称性的非线性 sigma 模型的一个循环处启动有效场论公式。此外，我们还发现了该模型的零模式的特殊行为。光前量子化中的南部-戈德斯通玻色子最近引起了人们对场论非微扰解的极大兴趣。