Gauge mediation beyond minimal flavor violation

被引:0
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作者
Lorenzo Calibbi
Paride Paradisi
Robert Ziegler
机构
[1] Université Libre de Bruxelles,Service de Physique Théorique
[2] CERN,Physik Department
[3] Theory Division,undefined
[4] TUM-IAS,undefined
[5] Technische Universität München,undefined
[6] Technische Universität München,undefined
关键词
Supersymmetry Breaking; Beyond Standard Model; Quark Masses and SM Parameters; Supersymmetric Standard Model;
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摘要
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 ΔF = 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 ΔF = 2 constraints). This structure allows to account for the recent observation of direct CP violation in D-meson decays.
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