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arXiv · 0907.1362

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

Joseph P. Conlon·Eran Palti
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Abstract

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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Joseph P. Conlon, Eran Palti. 2010-01-11. On Gauge Threshold Corrections for Local IIB/F-theory GUTs. https://doi.org/10.1103/physrevd.80.106004

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