Electroweak Symmetry Breaking Beyond the Standard Model

电弱对称性破缺的机制目前还不清楚。大型强子对撞机将在几年内探索相关的能量范围，并有望提供必要的线索，从而找到解决方案。由于目前还没有一种解释电弱对称破缺的方法在理论上令人信服，也没有经过实验测试，因此值得探索任何可能在这一领域取得进展的方法。PI的建议既探索建立模型意义上的替代方法，又根据对撞机和精度数据计算约束。这一提议的一个方面是探索希格斯机制的替代方案，作为质量的起源。这个想法是利用大质量矢量玻色子的Kaluza-Klein塔来延迟在没有希格斯机制的情况下发生的一元性破坏。皮？S计划进一步研究这个模型及其推广。如果在Tevatron或LHC能量下找不到希格斯粒子，那么有一种不同于希格斯粒子的产生质量的替代方案将是非常重要的。

The mechanism of Electro-Weak symmetry breaking is still not understood. LHC will probe the relevant energy range in a few years and will hopefully provide the necessary clues that will lead to a solution. Since no approach to explaining electroweak symmetry breaking is presently theoretically compelling and experimentally tested, it is worthwhile to explore any approach that might lead to progress in this area. The PI's propose to both explore alternative approaches in the sense of building models, and to work out constraints from collider and precision data. One aspect of this proposal is to explore an alternative to the Higgs mechanism as the origin of mass. The idea is to use Kaluza-Klein towers of massive vector bosons to delay the unitarity violations that occur without a Higgs mechanism. The PI?s plan to further study this model and its generalizations. Having an alternative scenario for generating mass other than a Higgs particle will be very important if the Higgs is not found at Tevatron or LHC energies.