Speaker
Zhengyun You
(Sun Yat-Sen (Zhongshan) University)
Description
The BESIII experiment has collected 2.6B $\psi(2S)$ events and 10B $J/\psi$ events. The huge data sample provide an excellent chance to search for rare processes in charmonium decays. In this talk, we report the recent search for $J/\psi \to \phi e^+e^-$, $D^-e^+\nu_e$. The big charmonium sample also produce millions of hyperons, which is used to study the weak decay of $\Sigma^- \to pe^-e^-/\Sigma^+X$, $\Xi^- \to \Xi^0e^-\nu_e$. The LNV/BNV processes $J/\psi\to \Lambda_c e^-$, $D\to K\pi ee$, $D->\Lambda/\Sigma e$, $J/\psi \to e \tau/e \mu$, $D^0\to pe$ are also searched. In addition, we also search for the FCNC process $D^0 \to \pi^0 \nu \bar{\nu}$ at BESIII.
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Primary author
Zhengyun You
(Sun Yat-Sen (Zhongshan) University)
