Gauge Mediation in F-Theory GUT Models
Aug, 200840 pages
Published in:
- Phys.Rev.D 80 (2009) 046006
e-Print:
- 0808.1571 [hep-th]
Report number:
- CALT-68-2691
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Abstract: (arXiv)
We study a simple framework for gauge-mediated supersymmetry-breaking in local GUT models based on F-theory 7-branes and demonstrate that a mechanism for solving both the \mu and \mu/B_{\mu} problems emerges in a natural way. In particular, a straightforward coupling of the messengers to the Higgs sector leads to a geometry which not only provides us with an approximate U(1)_{PQ} symmetry that forbids the generation of \mu at the GUT scale, it also forces the SUSY-breaking spurion field to carry a nontrivial PQ charge. This connects the breaking of SUSY to the generation of \mu so that the same scale enters both. Moreover, the messenger sector naturally realizes the D3-instanton triggered Polonyi model of arXiv:0808.1286 so this scale is exponentially suppressed relative to M_{GUT}. The effective action at low scales is in fact precisely of the form of the 'sweet spot supersymmetry' scenario studied by Ibe and Kitano in arXiv:0705.3686.- 12.60.Jv
- 11.25.Mj
- 12.10.Dm
- mediation: gauge
- grand unified theory: messenger
- supersymmetry: symmetry breaking
- F-theory
- effective action
- symmetry: U(1)
- membrane model: D-brane
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