  Mass spectrum of localized states (elementary particles) of single quantum
system is studied in the framework of Heisenberg's scheme. Localized states are
understood as cyclic representations of a group of fundamental symmetry
(Lorentz group) within a Gelfand-Neumark-Segal construction. It is shown that
state masses of lepton (except the neutrino) and hadron sectors of matter
spectrum are proportional to the rest mass of electron with an accuracy of
$0,41\%$.
