Speaker
Jihong Huang
(IHEP)
Description
We calculate the decay rate of a massive neutrino to a lighter one and a massless Nambu-Goldstone boson $\nu_i \to \nu_j + \phi$ in the general case, where the individual helicities of parent and daughter neutrinos are specified. Such invisible decays of cosmological relic neutrinos are studied and the impact on the capture rates in the PTOLEMY-like experiments is analyzed. We find that the helicity-changing decays of Dirac neutrinos play a crucial role, while those of Majorana neutrinos have no distinct effects.
Authors
Jihong Huang
(IHEP)
Shun Zhou
(IHEP, Beijing)
