A new mechanism for single spin asymmetries in strong interaction is proposed. It is based on instanton–induced nonperturbative chromomagnetic quark–gluon interaction. We estimate the contribution of this interaction to single spin asymmetry in quark–quark scattering. It is shown, that interference between quark spin–flip amplitude induced by instantons and spin–nonflip amplitude, which is rela...

Using the standard Hartree-Fock approximation on the basis of the random-phase approximation, we calculate the self-energy induced by exchange scattering due to electron-electron interaction in a spin-polarized two-dimensional electron gas 2DEG system. Applying the exchange self-energy to a Green’s function approach, we examine how the exchange interaction affects the spin-splitting in a 2DEG w...

We continue the discussion of a proposed model of hidden sector of the Universe, consisting of sterile spin-1/2 Dirac fermions (”sterinos”), sterile spin-0 bosons (”sterons”) with spontaneously nonzero vacuum expectation value, and sterile nongauge mediating bosons (”A bosons”) described by an antisymmetric-tensor field (of dimension one). The Standard-Model electromagnetic field (of dimension ...

We report results of calculations of the effect of spin-orbit interaction on electron spin relaxation in a lateral quantum dot. Our study is motivated by puzzling results of high source-drain transport measurements of singlet-triplet transitions of two electrons in lateral and vertical devices that show a strong asymmetry as a function of the applied magnetic field. Using exact diagonalization ...