On the Nature of the Sterile Neutrino

According to the assumption that sterile neutrinos are right-handed neutrinos, an analysis of the current experimental situation in neutron decay for right-handed currents was carried out. As the result of the analysis, it was found that there is an indication of the existence of the right-handed vector boson \({{W}_{{\text{R}}}}\) with a mass of \({{M}_{{{{W}_{{\text{R}}}}}}} = 304_{{ - 22}}^{{ + 28}}\,\,~{\text{GeV}}\) and a mixing angle with \({{W}_{{\text{L}}}}\): \(\zeta = - 0.038 \pm 0.014\). It is shown that this result does not contradict experiments at colliders to search for the hypothetical vector boson. This circumstance is the basis for discussing the possibility of extending the Standard Model with an additional gauge vector boson \({{W}_{{\text{R}}}}\) with small mixing with the left-handed vector boson \({{W}_{{\text{L}}}}\). In addition, there are grounds for considering the possibility of the existence of right-handed neutrinos. This circumstance is the basis for discussing the possibility of expanding the Standard Model with an additional gauge vector boson \({{W}_{{\text{R}}}}\) and right-handed neutrinos. In this regard, the possibility of explaining dark matter in the Universe by right-handed neutrinos is analyzed. Various aspects of such an approach to the problem of dark matter are discussed: dynamics of dark matter formation and stability of dark matter consisting of right-handed neutrinos.