The weak isospin and the gravity
  The Clifford pentad of 4X4 complex matrices defines the currents of the particles. The weak isospin transformation scatters the particle on two components into the 2-dimensional space of the antidiagonal Clifford matrices. The physics particles move in the 3-dimensional space of the diagonal Clifford matrices. Such sectioning of the 5-dimensional space on two subspace (2-dimensional and 3-dimensional) defines the Newtonian gravity principle. 
Gunn Quznetsov