Spontaneous $CP$ breaking and number of fermionic families
arXiv:1710.03582
Abstract
We provide a theoretical justification for the existence of fourth family fermions of the Standard Model by showing that in a novel form of spontaneous $CP$ breaking, fourth family is inevitable. This requires that fermions of third and fourth families must be mirror matter conjectured long back by Lee and Yang.
7 pages,thoroughly revised with a detailed discussion and references