Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-08-12
Phys.Rev.D80:046006,2009
Physics
High Energy Physics
High Energy Physics - Theory
34 pages, 4 figures; v4 revisions to section 6
Scientific paper
10.1103/PhysRevD.80.046006
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.
Marsano Joseph
Saulina Natalia
Schafer-Nameki Sakura
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