Gauge mediation in F-theory GUT models
- California Institute of Technology, 1200 E. California Blvd., Pasadena, California 91125 (United States)
We study a simple framework for gauge-mediated supersymmetry breaking in local grand unified theory (GUT) models based on F-theory 7-branes and demonstrate that a mechanism for solving both the {mu} and {mu}/B{sub {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){sub PQ} symmetry that forbids the generation of {mu} at the GUT scale, it also forces the SUSY-breaking spurion field to carry a nontrivial Peccei-Quinn (PQ) charge. This connects the breaking of supersymmetry (SUSY) to the generation of {mu} so that the same scale enters both. Moreover, the messenger sector naturally realizes the D3-instanton triggered SUSY-breaking model of [J. Heckman, J. Marsano, N. Saulina, S. Schafer-Nameki, and C. Vafa, arXiv:0808.1286.] so this scale is exponentially suppressed relative to M{sub 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 [M. Ibe and R. Kitano, J. High Energy Phys. 08 (2007) 016.].
- OSTI ID:
- 21322526
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevD.80.046006; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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