Unification of gravity, gauge fields and Higgs bosons

@article{Lisi2010UnificationOG,
  title={Unification of gravity, gauge fields and Higgs bosons},
  author={Arianna Lisi and Lee Smolin and Simone Speziale},
  journal={Journal of Physics A: Mathematical and Theoretical},
  year={2010},
  volume={43},
  pages={445401}
}
We consider a diffeomorphism invariant theory of a gauge field valued in a Lie algebra that breaks spontaneously to the direct sum of the spacetime Lorentz algebra, a Yang–Mills algebra and their complement. Beginning with a fully gauge invariant action—an extension of the Plebanski action for general relativity—we recover the action for gravity, Yang–Mills and Higgs fields. The low-energy coupling constants, obtained after symmetry breaking, are all functions of the single parameter present in… 

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TLDR
A Hamiltonian formulation of general relativity based on certain spinorial variables is introduced that enables one to imbed the constraint surface in the phase space of Einstein's theory into that of Yang-Mills theory.