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arXiv 0709.1202hep-phhep-th
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走向Z_2保护规范--Higgs统一

Towards Z_2-protected gauge--Higgs unification

S. Randjbar-Daemi, V. Rubakov

摘要:

在八维或更高维的通量紧致化理论中,规范场的额外维分量可以被视为希格斯场的候选者。我们提出了一种方法来保护这些组件从得到大的树级质量施加$Z_2$对称性作用于紧致流形和背景场。在我们的方案中,无限重KK模序列自然地从轻希格斯候选者中分离出来,后者的数目一般大于1。我们还提出了玩具模型与三个家庭的轻子,说明汤川部门在我们的计划是相当强的约束。在其中一个模型中,一个费米子在电弱对称破缺后获得树级质量,而另外两个费米子在树级自然保持无质量。

英文摘要:

In theories with flux compactification in eight or higher dimensions, the extra-dimensional components of the gauge field may be regarded as the Higgs field candidates. We suggest a way to protect these components from getting large tree-level masses by imposing a $Z_2$-symmetry acting on compact manifolds and background fields on them. In our scheme the infinite series of heavy KK modes naturally decouples from the light Higgs candidates, whose number is generically larger than one. We also present toy models with three families of leptons, illustrating that the Yukawa sector in our scheme is fairly strongly constrained. In one of these models, one fermion gets a tree-level mass after electroweak symmetry breaking, while two others remain naturally massless at the tree level.

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