Unified description of quarks and leptons in a multi-spinor field\n formalism

Multi-spinor fields which behave as triple-tensor products of the Dirac\nspinors and form reducible representations of the Lorentz group describe three\nfamilies of ordinary quarks and leptons in the visible sector and an additional\nfamily of exotic dark quarks and leptons in the dark sector of the Universe.\nApart from the ordinary set of the gauge and Higgs fields in the visible\nsector, another set of gauge and Higgs fields belonging to the dark sector are\nassumed to exist. Two sectors possess channels of communication through gravity\nand a bi-quadratic interaction between the two types of Higgs fields. A\ncandidate for the main component of the dark matter is a stable dark hadron\nwith spin 3/2, and the upper limit of its mass is estimated to be 15.1\nGeV/c$^2$.\n