Neutrino masses, states and interactions

This paper summarizes the parallel session IV: "Neutrino masses, states and interactions". This session covered experimental and theoretical aspects of the absolute neutrino mass scale, searches for neutrinoless double beta decay, and searches for sterile neutrinos in different mass regimes. Beyond that, lepton flavor violation in the charged lepton sector, exotic interactions in tritium beta decay, and electromagnetic properties of neutrinos were discussed.