Ettore Majorana (1906–1938) disappeared while traveling by ship from Palermo to Naples
in 1938. His fate has never been fully resolved and several articles have been written that …

All existing positive results on two-neutrino double beta decay and two-neutrino double
electron capture in different nuclei have been analyzed. Weighted average and …

The nEXO neutrinoless double beta (0νββ) decay experiment is designed to use a time
projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay …

We introduce a method for isospin restoration in the calculation of nuclear matrix elements
(NMEs) for 0 ν β β and 2 ν β β decay within the framework of the microscopic interacting …

A review is given of the theory and phenomenology of neutrino electromagnetic interactions,
which provide powerful tools to probe the physics beyond the standard model. After a …

The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to
search for neutrinoless double-β (0 ν β β) decay in Xe 136 with a target half-life sensitivity of …

Many extensions of the standard model of particle physics suggest that neutrinos should be
Majorana-type fermions—that is, that neutrinos are their own anti-particles—but this …

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 …

This book lays out the scientific goals to be addressed by the next-generation ground-based
cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated …

Neutrinoless double beta decay is a process that violates lepton number conservation. It
is<? format?> predicted to occur in extensions of the standard model of particle physics. This …