Abstract
We study gauge threshold corrections for local grand unified theory 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 MX=RMS. We argue that the stringy interpretation of this is via a locally uncanceled 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 MX. The enhancement to RMs is tied to grand unified theory breaking by a globally trivial hypercharge flux and will occur in all models realizing this mechanism.
| Original language | English |
|---|---|
| Article number | 106004 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 80 |
| Issue number | 10 |
| DOIs | |
| State | Published - 16 Nov 2009 |
| Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)