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arXiv 0907.1362hep-th
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局域IIB/F理论大统一理论的规范阈值修正

On Gauge Threshold Corrections for Local IIB/F-theory GUTs

Joseph P. Conlon, Eran Palti

摘要:

研究了IIB/F理论中局域大统一模型的规范阈值修正。与超引力的全纯性要求和Kaplunovsky-Louis公式的一致性意味着统一尺度被体半径R从弦尺度增强到M_X =RM_S。我们认为,弦的解释,这是通过本地未取消蝌蚪来源的超荷通量。这来源于传播到体中的闭合弦模;等效地,扩展到缠绕尺度M_X的开放弦规范耦合。对RM_s的增强与全局平凡超荷通量的GUT破缺有关,并且将发生在实现这种机制的所有模型中。

英文摘要:

We study gauge threshold corrections for local GUT models in IIB/F-theory. Consistency with holomorphy requirements of supergravity and the Kaplunovsky-Louis formula implies that the unification scale is enhanced by the bulk radius R from the string scale to M_X =RM_S. We argue that the stringy interpretation of this is via a locally uncancelled tadpole sourced by the hypercharge flux. This sources closed string modes propagating into the bulk; equivalently open string gauge coupling running up to the winding scale M_X. The enhancement to R M_s is tied to GUT breaking by a globally trivial hypercharge flux and will occur in all models realising this mechanism.

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