Could the Unification of Fermionic Flavours and Generations Precede the Unification of Flavours and Colours?

摘要

We consider the hypothesis that the "big" unification of fermionic flavours and generations takes over the r?le of the "grand" unification of flavours and colours, possibly being followed by the "extended" unification of flavours, generations and colours. We propose a definite unification scheme of fermion interactions which differs from the conventional one by interchanging the r?les of four colours (l,r,y,b) and four generations (e,mu ,au ,omega ), thereby implying the existence of the fourth fermion generation (omega ) consisting of two leptons (u _omega ,omega ^- and two quarks (h,o).