Stability of proton and maximally symmetric minimal unification model for basic forces and building

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With the hypothesis that all independent degrees of freedom of basic building blocks should be treated equally on the same footing and correlated by a possible maximal symmetry, we arrive at a 4-dimensional space-time unification model. In this model the basic building blocks are Majorana fermions in the spinor representation of 14-dimensional quantum space-time with a gauge symmetry G4MD =SO(1,3)× SU(32)× U(1)A× SU(3)F. The model leads to new physics including mirror particles of the standard model. It enables us to issue some fundamental questions that include: why our living space-time is 4-dimensional, why parity is not conserved in our world, how the stability of proton is, what the origin of CP violation is and what the dark matter can be.
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