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Sequestering in String Compactifications | Marcus Berg
; David Marsh
; Liam McAllister
; Enrico Pajer
; | Date: |
8 Dec 2010 | Abstract: | We study the mediation of supersymmetry breaking in string compactifications
whose moduli are stabilized by nonperturbative effects. We begin with a
critical review of arguments for sequestering in supergravity and in string
theory. We then show that geometric isolation, even in a highly warped space,
is insufficient to achieve sequestering: in type IIB compactifications,
nonperturbative superpotentials involving the Kahler moduli introduce
cross-couplings between well-separated visible and hidden sectors. The scale of
the resulting soft terms depends on the moduli stabilization scenario. In the
Large Volume Scenario, nonperturbative superpotential contributions to the soft
trilinear $A$ terms can introduce significant flavor violation, while in KKLT
compactifications their effects are negligible. In both cases, the
contributions to the $mu$ and $Bmu$ parameters cannot be ignored in general.
We conclude that sequestered supersymmetry breaking is possible in
nonperturbatively-stabilized compactifications only if a mechanism in addition
to bulk locality suppresses superpotential cross-couplings. | Source: | arXiv, 1012.1858 | Services: | Forum | Review | PDF | Favorites |
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