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Dynamical Symmetry Breaking in Quantum Field Theory

量子场论中的动力学对称性破缺

基本信息

批准号：
02044104
负责人：
MUTA Taizo
金额：
$ 3.2万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

Quarks and leptons are described by quantum chronodynamics and electroweak theory. While the color symmetry of quantum chromodynanics is completely conserved, the electroweak symmetry is spontaneously broken. Searching for an origin of the electroweak symmetry breaking is one of the first steps to gain a unified view on the behavior of quarks and leptons.The spontaneous symmetry breaking in electroweak theory is triggered by elementary Higgs fields with nonvanishing vacuum expectation value. For a deeper understanding of the Higgs mechanism one tries to realize the spontaneous electroweak symmetry breaking as a dynamical process without elementary Higgs fields. This is the dynamical electroweak symmetry breaking in which the Higgs field. appears as a composite field of fundamental fermions.In the present research project the dynamical electroweak symmetry breaking based on the composite Higgs field is investigated and some models of the dynamical electroweak symmetry breaking are propo … More sed and analyzed. The top condensation model has been comprehensively investigated by W. A. Bardeen and his collaborators. They succeeded to generalize the model to accommodate supersymmetry with the assistance of K. Sasaki, M. Carena, C. Wagner and T. Clark. J. Kodaira partly contributed to this joint venture through the collaboration with K. Sasaki. General model-independent properties of the composite Higgs model have been investigated by T. Onogi and his collaborator. They found a new relation between the Higgs mass and the vector boson mass. As one of the possible phenomena in the composite Higgs model, the dynamical origin of the CP violation has been searched for by T. Nuta and his collaborators. They found a new model of the dynamical CP violation based on the Dashen's old idea and are trying to generalize the model to explain the realistic CP violating phenomena.In order to present our accomplishments and to have discussions with theoretical physicists from all over the world we had an international workshop on electroweak symmetry breaking on Nov. 12 through Nov. 15 in 1991 in Hiroshima. The number of participants was 135 (45 from abroad and 90 domestic) and there were about 40 talks on the composite Higgs models. The proceedings of the Workshop will be published in June, 1992 from the World Scientific Pub. Co. Less

夸克和轻子由量子计时动力学和电弱理论描述。当量子色动力学的色对称性完全守恒时，电弱对称性自发破缺。寻找电弱对称性破缺的起源是对夸克和轻子行为获得统一认识的第一步，电弱理论中的自发对称性破缺是由具有非零真空期望值的基本Higgs场触发的。为了更深入地理解Higgs机制，人们试图将自发的电弱对称性破缺理解为一个没有基本Higgs场的动力学过程。这就是动力学电弱对称破缺希格斯场。本文研究了基于复合Higgs场的动力学电弱对称性破缺，提出了动力学电弱对称性破缺的几种模型，并讨论了它们之间的相互作用。 ...更多信息 sed和分析。W. A.巴伯和他的同伙。在K的帮助下，他们成功地将模型推广到了超对称性。Sasaki，M.卡雷纳角瓦格纳和T.克拉克J.科代拉通过与K.佐佐木T。小野木和他的合作者。他们发现了希格斯质量和矢量玻色子质量之间的新关系。CP破坏是复合Higgs模型中可能出现的现象之一，T.努塔和他的同伙。为了展示我们的研究成果，并与世界各国的理论物理学家进行讨论，我们于1991年11月12日至15日在广岛召开了一次关于电弱对称性破缺的国际研讨会。参加者人数为135人（45人来自国外，90人来自国内），关于复合希格斯模型的演讲约有40场。讲习班的会议记录将于1992年6月由世界科学出版社出版。公司减