Quark and Lepton Mixings as Manifistations of a Violated Mirror Symmetry?
Arguments are presented that mirror particles could be crucial in construction mechanisms of SM fermion spectra and their mixing properties. 1.With mirror quark participation the quark mixing proves to be qualitatively close to the experimentally observed form. The latter is determined here mainly by the quark mass hierarchy and by the restrictions imposed by the weak SU(2) symmetry. 2.In identical conditions and with participation of mirror leptons the SM lepton mixing can become of the type prompted by experiment - very dissimilar to the quark case. The obtained mixing form evidences in favour of the inverse SM neutrino spectrum and the Dirac (not Majorana) nature of neutrinos.