SU(2) x U(l)⁵ Model of Electroweak Interaction

Regarding the weak hypercharge y in the standard model as a non-foundamental quantum number and decomposing it as the sum of three kinds of lepton numbers l₁,l₂,l₃, the baryon number b and the weak strange numbers, we obtain an electroweak model with symmetry group SU(2)_L x U (l) l₁ x U(1)l₂ x U (1)1₃, x U(1)_b x U(1)_s, where five neutral weak vector particles arise, with one of them being the same as, Z⁰ in the standard model and the other four being the new Z’s.