Speaker
Prof.
Xu Feng
(Peking University)
Description
Recently four experiments have demonstrated new levels of sensitivity to neutrinoless double beta ($0\nu\beta\beta$) decay. Such decay, if exists, would prove that neutrinos are Majorana fermions. The light-neutrino exchange is the most popular mechanism to explain the $0\nu\beta\beta$ decay. In this mechanism, the decay amplitude is proportional to the effective neutrino mass $m_{\beta\beta}$ and thus the detection of $0\nu\beta\beta$ decay would provide the information about the absolute neutrino mass. We report the lattice QCD calculation of the $0\nu\beta\beta$ decay amplitude, which involves light-neutrino exchange and significant long-distance contributions.
Primary author
Prof.
Xu Feng
(Peking University)