Higgs-Flavor Groups, Naturalness, and Dark Matter
arXiv:1105.2085 · doi:10.1103/PhysRevD.84.055017
Abstract
In the absence of low-energy supersymmetry, a multiplicity of weak-scale Higgs doublets would require additional fine-tunings unless they formed an irreducible multiplet of a non-abelian symmetry. Remnants of such symmetry typically render some Higgs fields stable, giving several dark matter particles of various masses. The non-abelian symmetry also typically gives simple, testable mass relations.
Some comments added after Eqs. (2) and (12)
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