The present experimental results on neutrino flavour oscillations provide evidence for non-
zero neutrino masses, but give no hint on their absolute mass scale, which is the target of …

The theoretical and experimental issues relevant to neutrinoless double beta decay are
reviewed. The impact that a direct observation of this exotic process would have on …

Neutrinoless double-beta decay, which is a very old and yet elusive process, is reviewed. Its
observation will signal that the lepton number is not conserved and that the neutrinos are …

We review the particle physics aspects of neutrino-less double beta decay. This process can
be mediated by light massive Majorana neutrinos (standard interpretation) or by something …

In this article we analyze the nuclear matrix elements (NME) of the neutrinoless double beta
decays (0νββ) of the nuclei 48Ca, 76Ge, 82Se, 124Sn, 128Te, 130Te and 136Xe in the …

The observation of neutrinoless double beta decay (DBD) will have important
consequences. First it will signal that lepton number is not conserved and the neutrinos are …

In the Standard Model the total lepton number is conserved. Thus, neutrinoless double-β
decay, in which the total lepton number is violated by two units, is a probe of physics beyond …

We report on an improved measurement of the 2 ν β β half-life of 136 Xe performed by EXO-
200. The use of a large and homogeneous time-projection chamber allows for the precise …

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory
from 2003 to 2010, was designed to search for neutrinoless double-β (0 ν β β) decay. We …

The role that neutrinos have played in the evolution of the Universe is the focus of one of the
most fascinating research areas that has stemmed from the interplay between cosmology …