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Gauge Mediation beyond Minimal Flavor Violation

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arxiv 1304.1453 v3 pith:BIXIQDLQ submitted 2013-04-04 hep-ph

classification hep-ph
keywords flavormodelmediationdeltagaugeminimalspectrumstrong
verification ladder T0 review T1 audit T2 compute T3 formal
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We study a minimal modification of Gauge Mediation in which the messenger sector couples directly to the MSSM matter fields. These couplings are controlled by the same dynamics that explain the flavor hierarchies, and therefore are parametrically as small as the Yukawas. This setup gives rise to an interesting SUSY spectrum that is calculable in terms of a single new parameter. Due to large A-terms, the model can easily accommodate a 126 GeV Higgs with a relatively light SUSY spectrum. The flavor structure depends on the particular underlying flavor model, but flavor-violating effects arise dominantly in the up-sector and are strongly suppressed in Delta F =2 observables. This strong suppression is reminiscent of what happens in the case of wave function renormalization or Partial Compositeness, despite the underlying flavor model can be a simple U(1) flavor model (which in the context of Gravity Mediation suffers from strong Delta F =2 constraints). This structure allows to account for the recent observation of direct CP violation in D-meson decays.

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  1. Revisiting the LHC Constraints on Gauge-Mediated Supersymmetry Breaking Scenarios

    hep-ph 2024-11 conditional novelty 6.0 of 10

    In a realistic general gauge mediation model, including gravitino decays of all sparticles weakens ATLAS mono-photon exclusion limits on the gluino-NLSP mass plane, especially for negative mu and compressed spectra.

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