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Sequestering in string compactifications

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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 Kähler 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 scenarios, the contributions to the μ and Bμ 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.

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Authors and Affiliations

  1. Oskar Klein Center for Cosmoparticle Physics and Department of Physics, Stockholm University, Albanova, SE-106 91, Stockholm, Sweden

    Marcus Berg

  2. Department of Physics, Cornell University, Ithaca, NY, 14853, U.S.A.

    David Marsh, Liam McAllister & Enrico Pajer

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  1. Marcus Berg
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  2. David Marsh
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Correspondence to David Marsh.

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ArXiv ePrint:1012.1858

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Berg, M., Marsh, D., McAllister, L. et al. Sequestering in string compactifications. J. High Energ. Phys. 2011, 134 (2011). https://doi.org/10.1007/JHEP06(2011)134

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