UDC 539.12 Topological Soliton Configurations in 8-Spinor Nonlinear Model Yu. <...> Umniyati Department of Theoretical Physics Peoples’ Friendship University of Russia 6, Miklukho-Maklaya str., Moscow, 117198, Russia We study the structure of the charged topological solitons in the lepton sector of the nonlinear 8-spinor model, at small distances the closed-string approximation being used. <...> The mass, the spin and the magnetic moment of the soliton configuration with the unit leptonic number are estimated. <...> Due to the identity the Dirac current appears to be time-like 4-vector that permits one to introduce the special form of the Higgs potential depending on the current squared. <...> Within the framework of this model the natural classification of leptons and baryons can be realized via the Higgs mechanism. <...> Concentrating on the lepton sector we study the simplest soliton configuration endowed with the unit Hopf index playing the role of the lepton number. <...> Investigating the behavior of solutions at large and small distances we obtain the numerical estimate of physical characteristics of the topological soliton. <...> The special symmetry group is used in our calculation, the combined rotations in ordinary and isotopic spaces being considered. <...> The corresponding equivariant spinor fields involve phase functions linear with respect to azimuthal and toroidal angles. <...> This property permits one to find explicit value of the topological invariant for the axially-symmetric configuration and to investigate the dependence of the physical characteristics on topology. <...> Introduction In our previous paper [1] the nonlinear 8-spinor model was suggested for the unified description of leptons and baryons as topological solitons in Faddeev [2] and Skyrme [3] models respectively. <...> This unification is based on the special 8-spinor identity discovered by the Italian geometer Brioschi [4]: jµjµ −˜ jµ = s2 +p2 +v2 +a2, jµ˜ where the following quadratic spinor quantities are introduced: s = ¯ ΨΨ, a = ı¯ Ψ = Ψ+γ0 and λ standing for Pauli matrices in the flavor (isotopic) space. <...> Here the diagonal (Weyl) representation for γ5 = γ+ with ¯ the unitary Dirac matrices acting on Minkowski spinor indices. <...> Taking into account the time-like character of the 4-vector jµ, the topological 5 is used and γµ, µ = 0, 1, 2, 3, designate distinction between leptons and baryons can be realized via the Higgs mechanism, the special form of the Higgs potential being used: V <...>