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arXiv 2108.08690hep-phhep-th
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高质量的三代大统一理论

High-quality grand unified theories with three generations

Ning Chen

摘要:

我们将么正群扩展到${\rm SU}(5)$和${\rm SU}(6)$之外,以寻找可能的大统一理论,这些理论无需简单重复即可产生三代标准模型费米子。通过要求在短距离上的渐近自由理论,我们发现${\rm SU}(7)$、${\rm SU}(8)$和${\rm SU}(9)$的规范群以及它们的无反常不可约表示是这样的候选者。另外两个规范群${\rm SU}(10)$和${\rm SU}(11)$也可以得到没有渐近自由的分代结构。我们还发现,这些模型可以解决Peccei-Quinn(PQ)质量问题,这是内在的轴子模型,从对称性要求确定的领先PQ破缺运营商。

英文摘要:

We extend the unitary groups beyond the ${\rm SU}(5)$ and ${\rm SU}(6)$ to look for possible grand unified theories that give rise to three-generational Standard Model fermions without the simple repetition. By demanding asymptotic free theories at short distances, we find gauge groups of ${\rm SU}(7)$, ${\rm SU}(8)$ and ${\rm SU}(9)$ together with their anomaly-free irreducible representations are such candidates. Two additional gauge groups of ${\rm SU}(10)$ and ${\rm SU}(11)$ can also achieve the generational structure without asymptotic freedom. We also find these models can solve the Peccei-Quinn (PQ) quality problem which is intrinsic in the axion models, with the leading PQ-breaking operators determined from the symmetry requirement.

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