Study on ${\nu }_{\mu }$, ${\nu }_{\tau }$ Decays and CP-Non Invariance at Early Epoch of the Universe

Wu-Sheng Dai, Song Gao, Xue-Qian Li

We study the ${\nu }_{\mu }$ and ${\nu }_{\tau }$ decays in the early epoch of the universe. If $m_{{\nu }_{\tau }}>2m_e$, there would be a CP asymmetry between ${\nu }_{\tau }\to e^{+}+e^{-}+{\nu }_e$ and $\barν_τ \rightarr…