Radiative emission of neutrino pair from nucleus and inner core electrons in heavy atoms

Understand

Radiative emission of neutrino pair (RENP) from atomic states is a new tool to experimentally investigate undetermined neutrino parameters such as the smallest neutrino mass, the nature of neutrino masses (Majorana vs Dirac), and their CP properties.

• We study effects of neutrino pair emission either from nucleus or from inner core electrons in which the zero-th component of quark or electron vector current gives rise to large coupling.
• Both the overall rate and the spectral shape of photon energy are given for a few cases of interesting target atoms.
• Calculated rates exceed those of previously considered target atoms by many orders of magnitudes.