Neutrino minimal standard model predictions for neutrinoless double beta decay

Prediction of the effective Majorana mass for neutrinoless double β decay in a simple extension of the standard model (νMSM) is given. The model adds three right-handed neutrinos with masses smaller than the electroweak scale and explains dark matter of the Universe. This leads to constraints 1.3<m_ββNH<3.4 meV in normal neutrino mass hierarchy and 13<m_ββIH<50 meV in inverted hierarchy.