Aspects of Symmetry Breaking in Grand Unified Theories
Aspects of Symmetry Breaking in Grand Unified Theories
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大统一理论中对称性破缺的各个方面
DOI：
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发表时间：
2011
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通讯作者：
L. Luzio
中科院分区：
文献类型：
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作者：
L. Luzio
我们重新考虑SO（10）大统一理论中的自发对称性破缺问题。重点放在追求最小的希格斯部门导致一个现象学上可行的打破标准模型规范组。长期以来的结果表明，非超对称SO（10）模型只有伴随表象触发破缺的第一阶段，不能提供一个成功的规范统一。本论文的主要结果是观察到，这个不去是一个工件的树级潜力和量子校正打开一个自然的方式有利于规范耦合统一的真空模式。一个类似的禁止，防止SO（10）在可重正化的水平上断裂，直到伴随的表示，在超对称的情况下也成立。在这方面，我们表明，通过考虑超荷的翻转SO（10）嵌入提供了一种可能的出路。最后，对极小SO（10）理论的寻优进行了研究.
We reconsider the issue of spontaneous symmetry breaking in SO(10) grand unified theories. The emphasis is put on the quest for the minimal Higgs sector leading to a phenomenologically viable breaking to the standard model gauge group. Longstanding results claimed that nonsupersymmetric SO(10) models with just the adjoint representation triggering the first stage of the breaking cannot provide a successful gauge unification. The main result of this thesis is the observation that this no-go is an artifact of the tree level potential and that quantum corrections opens in a natural way the vacuum patterns favoured by gauge coupling unification. An analogous no-go, preventing the breaking of SO(10) at the renormalizable level with representations up to the adjoint, holds in the supersymmetric case as well. In this respect we show that a possible way-out is provided by considering the flipped SO(10) embedding of the hypercharge. Finally, the case is made for the hunting of the minimal SO(10) theory.