[en] In the framework of the gauge theory with mixing of the fermionic states a general expression of the amplitude of radiative transition between two fermions with different quantum numbers is obtained. The fermions can be laying on or off the mass shell. The formulae obtained are of interest for a wide circle of problems which deal with nondiagonal transitions

[en] The problem of calculation of the electric dipole moments (EDM) of baryons, especially the neutron one, in the framework of the Kobayashi-Maskawa CP noninvariant theory is considered. The contribution of inter-quark forces in EDM of baryons is taken into account. The estimate of EDM is shown to be equal D/e approximately 10^-34 cm. This value agrees with the estimate obtained by summation EDM of single quarks calculated with accounting of strong interactions

[en] The form factors of K_l3-decay are evaluated in the framework of theory with effective chiral lagrangian incorporating O± and I± fields. In the model under consideration, a renormalization of mass of pseudoscalar mesons, arising in the standard approach due to mixing δ_μ^π with axial-vector field, is absent. This paper argues against the schemes with such a mixing. This theory predicts for the parameter ξ(0)/f+(0) the value ξ(0)=-0.235. 16 refs

[en] Using the chiral σ model with broken U(3)_LxU(3)_R symmetry we have calculated in the p⁴-approximation a difference between the slope parameters g⁺ and g^- describing the energy distributions of ''odd' pions in K⁺→π⁺π⁺π^- and K^-→π^-π^-π⁺ decays. The result is: (g⁺ - g^-)/(g⁺ + g^-) = -(1.9±0.8)10^-2s₂s₃ sin δ, where s₂, s₃ and δ are the parameters of the Kobayashi-Maskawa mixing matrix. (author). 28 refs, 3 figs

[en] Basing on experimental data, the limits on violation of the ΔQ = ΔS rule in the semileptonic decays of kaons are evaluated. The results are obtained without assumption that CPT invariance is the exact symmetry

[en] On the example of the SU(2)xU(1) gauge theory the regularization procedure for different nondiagonal amplitudes is defined in a special unitary gauge. This gauge is not usually used for the fear of ambiguities, though it has some advantages due to a sharp decrease of the number of diagrams of the fixed order. A formulae for the regularized selfenergy and vertex operators are obtained and an explanation is given for the meaning of regularized vertex functions in unitary gauge. In conclusion a correctness of calculations with the help of the developed formalism is demonstrated on two examples

[en] In the framework of the theory with an effective chiral Lagrangian including 0^± and 1± fields the author calculates the form factors of K_l3 decay. In the model there is no renormalization of the masses of the pseudoscalar mesons as in the standard approach, owing to the mixing of ∂_μ π with the axial-vector field. He gives arguments against schemes with such mixing. For the parameter ξ (0) = f_- (0)/f₊ (0) the theory predicts the value ξ (0) = -0.235

[en] A simple scheme of renormalizable theory is presented in which μ-e universality is violated in vector field interaction. It is shown that to check up the existence of the vector field interaction with the electronic and muonic charge in a different way the key experiments are those on investigations of νsub(e) (ν tilde sub(e)) and νsub(μ) (ν tilde sub(μ)) scattering on electrons

[en] It is shown that a natural magnitude of the radiative width of the δ meson must be Γ_δγγ ∼ 1 keV. The reason for which the published experimental number for Γ_δγγ seems to be too low is presented

[en] It is shown in the frame of gauge theory of weak and electromagnetic interactions that if the heavy leptons exist, μ→eγ decay is possible with branching ratio 10^-9