Multiple point principle of the Standard Model with scalar singlet dark matter and right-handed neutrinos

We consider the multiple point principle of the Standard Model with scalar singlet dark matter (DM) and three heavy right-handed neutrinos at the scale where the beta function beta(lambda). of the effective Higgs self-coupling lambda(eff) becomes zero. We do a two-loop analysis and find that the top quark mass M-t and the Higgs portal coupling. are strongly related to each other. One of the good points of this model is that a larger M-t(greater than or similar to 171 GeV) is allowed. This fact is consistent with the recent experimental value M-t = 173.34 +/- 0.76 GeV [ATLAS, CDF, CMS, and D0 Collaborations, arXiv: 1403.4427 [hep-ex]], which corresponds to the DM mass 769 GeV <= m(DM) <= 1053 GeV.