Chiral scalar fields, electroweak SU(2)left x U(1) and the quantization of the electric charge

I study the scalar representations of the electroweak group of the Standard Model, with a special emphasis on their chiral properties and on their behaviour by the discrete symmetries P and CP. A gauge theory for J=0 mesons naturally springs out, together with a new approach to the question of the electroweak violation of CP. When acting in the 4-dimensional space of states spanned by the special representations under scrutiny in this paper, the electric charge appears as one of the three generators of the diagonal SU(2) and its eigenvalues are consequently quantized.