Dark Matter Mixing within the Seesaw Type II Mechanism in the Left-Right Symmetric Model

The seesaw type II mechanism is considered within the framework of a left-right chiral model with a gauge group $$SU{{(2)}_{L}} \times SU{{(2)}_{R}} \times U(1)$$ , the lepton sector of which includes three generations of heavy Majorana neutrinos. The dependence of the mixing parameters of the lightest sterile neutrino as a dark matter particle on the scales of left-right symmetry breaking in the case of direct and inverse hierarchies of active neutrino masses is analyzed.