Abstract
Models with Dirac gauginos provide appealing scenarios for physics beyond the standard model. They have smaller radiative corrections to the Higgs mass, a suppression of certain SUSY production processes, and ameliorated flavor constraints. Unfortunately, they also generally have tachyons, the solutions to which typically spoil these positive features. The recently proposed "Goldstone Gaugino" mechanism provides a simple solution that eliminates these tachyonic states. We provide details on this mechanism and explore models for its origin. In particular, we find SUSY QCD models that realize this idea simply, and discuss scenarios for unification.
Highlights
The turn-on of the LHC has challenged a number of basic ideas about naturalness
In the minimal supersymmetric standard model (MSSM), for instance, large stop masses feed into the Higgs soft masses quickly, meaning that the stop masses should be ideally generated at a low scale
A minimal realization of the Goldstone gaugino scenario can arise in models of SUSY QCD that become strongly coupled in the IR once we weakly gauge a subgroup of the theory’s flavor symmetry and identify it with the SM
Summary
The turn-on of the LHC has challenged a number of basic ideas about naturalness. While parameter regions for supersymmetry and other solutions to the hierarchy problem remain, large swaths of “natural” parameter space have been eliminated, causing us to rethink whether the weak scale is, itself, natural [1,2,3,4,5,6]. Heavy Dirac gauginos weaken flavor and CP constraints considerably [16], alleviating the supersymmetry (SUSY) flavor and CP problems These setups can naturally arise from a number of UV scenarios [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59].
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