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arXiv 0802.2809hep-thhep-ph
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爆破中的紧凑杂种优势轨道折叠

Compact heterotic orbifolds in blow-up

Stefan Groot Nibbelink, Denis Klevers, Felix Ploger, Michele Trapletti, Patrick K. S. Vaudrevange

摘要:

我们比较杂化弦模型的orbifolds与超引力模型的光滑紧空间,通过解决orbifolds奇点。我们的主要重点是杂种优势E8 xE 8模型的解决方案的紧凑T^6/Z_3 orbifold与威尔逊线。我们解释了如何不同的规范通量在不同的解决固定点可以解释在吹下来威尔逊线。即使这样的威尔逊线从轨道的角度来看是微不足道的,他们仍然可以导致额外的对称性破缺爆破。在规范相互作用、无质量谱和异常取消的水平上,轨道和解析模型之间实现了完全一致。在这种匹配中,爆破模是至关重要的:它们扮演着模型依赖的轴子的角色,参与了多个异常U(1)的消除。我们通过研究具有两条Wilson线的Z_3 MSSM模型的爆破来说明各种问题:如果它的所有不动点同时分解,则SM规范群必然是破缺的。最后,我们详细讨论了C^2/Z_2复二维分辨率上的反常抵消。

英文摘要:

We compare heterotic string models on orbifolds with supergravity models on smooth compact spaces, obtained by resolving the orbifold singularities. Our main focus is on heterotic E8xE8 models on the resolution of the compact T^6/Z_3 orbifold with Wilson lines. We explain how different gauge fluxes at various resolved fixed points can be interpreted in blow down as Wilson lines. Even when such Wilson lines are trivial from the orbifold perspective, they can still lead to additional symmetry breaking in blow-up. Full agreement is achieved between orbifold and resolved models, at the level of gauge interactions, massless spectrum and anomaly cancellation. In this matching the blow-up modes are of crucial importance: they play the role of model-dependent axions involved in the cancellation of multiple anomalous U(1)'s on the resolution. We illustrate various aspects by investigating blow-ups of a Z_3 MSSM model with two Wilson lines: if all its fixed points are resolved simultaneously, the SM gauge group is necessarily broken. Finally, we explore in detail the anomaly cancellation on the complex two dimensional resolution of C^2/Z_2.

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