Gauge Mediation beyond Minimal Flavor Violation

Abstract

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.

32 pages, 6 figures. V2: discussion improved, references added, typos corrected. V3: minor corrections, published version

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• Long-Lived Staus and Displaced Leptons at the LHC
• Implications of the LHCb discovery of CP violation in charm decays
• Lepton Flavor Violation in Flavored Gauge Mediation
• Non-Degenerate Squarks from Flavored Gauge Mediation
• Prompt Signals and Displaced Vertices in Sparticle Searches for Next-to-Minimal Gauge Mediated Supersymmetric Models
• Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
• Focus Point Supersymmetry in Extended Gauge Mediation
• Simple model for large CP violation in charm decays, B-physics anomalies, muon g-2, and Dark Matter
• Selectron NLSP in Gauge Mediation
• General Gauge Mediation at the Weak Scale
• On messengers couplings in extended GMSB models
• Light third-generation squarks from flavour gauge messengers
• LHC Benchmarks from Flavored Gauge Mediation
• A little more Gauge Mediation and the light Higgs mass
• Natural Supersymmetry and Dynamical Flavour with Metastable Vacua
• Reducing the fine-tuning of gauge-mediated SUSY breaking
• Flavored Gauge Mediation with Discrete Non-Abelian Symmetries
• Gauge Mediation at LHC: status and prospects
• Extended Gauge Mediation in the NMSSM with Displaced LHC Signals
• Low Fine Tuning in Yukawa-deflected Gauge Mediation
• Sizable Stop Mixing in Flavored Gauge Mediation Models with Discrete Non-Abelian Symmetries
• Signs of Tops from Highly Mixed Stops
• Flavored Gauge-Mediated Supersymmetry Breaking Models with Discrete Non-Abelian Symmetries
• Implications of the evidence for direct $\mathbf{CP}$ violation in $D\to {\pi }^{+}{\pi }^{-}$ decays
• Generating the Cabibbo Angle in Flavored Gauge Mediation Models with Discrete Non-Abelian Symmetries
• Looking for lepton flavour violation in supersymmetry at the LHC
• Higgs mass from neutrino-messenger mixing