Electroweak unification of quarks and leptons in a gauge group $S{U}_C(3)\times SU(4)\times U_X(1)$

Abstract

A model for electroweak unification of quarks and leptons, in a gauge group $S{U}_C(3)\times SU(4)\times U_X(1)$ is constructed. The model requires, three generations of quarks and leptons which are replicas (mirror) of the standard quarks and leptons. The gauge group $SU(4)\times U_X(1)$ is broken in such a way so as to reproduce standard model and to generate heavy masses for the vector bosons ($W_{R_{\mu }}^{\pm }$, $Z_{\mu }^{\prime }$,$Z_{\mu }^{\prime \prime }$), the leptoquarks and mirror fermions. It is shown lower limit on mass scale of mirror fermions is $m_E\ge \frac{m_Z}{2}$, $E^{-}$ being the lightest mirror fermion coupled to Z boson. As the universe expands, the heavy matter is decoupled at an early stage of expansion and may be a source of dark matter. Leptoquarks in the model connect the standard model and mirror fermions. Baryon genesis in our Universe implies antibaryon genesis in mirror Universe.

Comments: 7 pages, 0 figures