Abstract

The neutrino mass is the only laboratory measurement that violates the Standard Model and it is one of our best bets for a glimpse of the physics that lies beyond it. In particular, it leads naturally to the possibility that the neutrino is a Majorana particle. Equal to their anti-partners, Majorana neutrinos could explain the neutrino mass scale and the matter-antimatter asymmetry in today’s universe. For answering this pressing question, our only handle is the observation of neutrinoless double beta decays (0vbb).

Currently taking background water data, the SNO + experiment aims for world leading 0vbb sensitivity using 1.3 tonne of Te130 loaded into a kilotonne scale liquid scintillator detector. Here we review the experiment’s progress and sensitivity, making the case for Te130 and large liquid scintillator experiments for probing the inverted hierarchy and beyond.