SU(3)_c X SU(4)_L X U(1)_x model for three families

Luis A. Sanchez, Felipe A. Perez, William A. Ponce

An extension of the Standard Model to the local gauge group $SU(3{)}_c\otimes SU(4{)}_L\otimes U(1{)}_X$ as a three-family model is presented. The model does not contain exotic electric…