TH BSM Forum

Natural SUSY and Dynamical Flavour with Metastable vacua

by Moritz McGarrie (University of the Witwatersrand)

4-2-011 - TH common room (CERN)

4-2-011 - TH common room


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We construct a natural supersymmetry breaking model, with light third generation squarks and small radiative corrections to the Higgs up soft mass, by identifying flavour gauge messengers with magnetic quark superfields of =1 Supersymmetric QCD. Although these models of flavour and supersymmetry breaking are strongly coupled, through Seiberg duality we have a calculable and predictive scenario of natural supersymmetry. In this identification, the flavour breaking scale is identified with the magnetic quark vev. Supersymmetry breaking in a gauged SU(3)F flavour sector arises dynamically and in combination with the NMSSM and usual gauge mediation can generate light third generations squarks whilst keeping first and second generations above exclusions. We show that dynamical supersymmetry breaking in a long-lived meta-stable vacuum is not only phenomenologically viable but also natural when extended to include flavour gauge mediation, and may help to explain the flavour structure of the MSSM. The Yukawa and CKM matrices arise from piece-wise Higgsing of the magnetic quarks. This setup implies that the flavour hierarchies may emerge dynamically from the various scales of magnetic SQCD. Their simplicity suggests that natural supersymmetry (breaking) may be more generic in the landscape of string vacua than previously thought.
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