期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP06(2014)119
关键词
Flux compactifications; Supersymmetry Breaking; F-Theory; Intersecting branes models
资金
- ERC Advanced Grant SPLE [ERC-2012-ADG-20120216-320421, FPA 2009-09017, FPA 2009-07908, FPA 2010-20807-C02, AGAUR 2009-SGR-168]
- ERC Starting Grant HoloLHC-306605
- spanish MINECO Centro de excelencia Severo Ochoa Program [SEV-2012-0249]
- FPU [AP-2012-2690]
Closed string fluxes induce generically SUSY-breaking soft terms on supersymmetric type IIB orientifold compactifications with D3/D7 branes. This was studied in the past by inserting those fluxes on the DBI+CS actions for adjoint D3/D7 fields, where D7-branes had no magnetic fluxes. In the present work we generalise those computations to the phenomenologically more relevant case of chiral bi-fundamental fields laying at 7-brane intersections and F-theory local matter curves. We also include the effect of 7-brane magnetic flux as well as more general closed string backgrounds, including the effect of distant D3((D3) over bar)-branes. We discuss several applications of our results. We find that squark/slepton masses become in general flux-dependent in F-theory GUT's. Hypercharge-dependent non-universal scalar masses with a characteristic sfermion hierarchy m(E)(2) < m(L)(2) < m(Q)(2) < m(D)(2) < m(U)(2) are obtained. There are also flavor-violating soft terms both for matter fields living at intersecting 7-branes or on D3-branes at singularities. They point at a very heavy sfermion spectrum to avoid FCNC constraints. We also discuss the possible microscopic description of the fine-tuning of the EW Higgs boson in compactifications with a MSSM spectrum.
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