Description
The BESIII experiment is a symmetric $e^+e^-$ collider operating at c.m. energy from 2.0
to 4.95 GeV. With the world’s largest threshold production data set of $J/\Psi$ (10
billion), $\Psi(3686)$ (2.6 billion), and $20 fb^{-1}$ of D meson pairs from $\Psi(3770)$ decay,
we are able to search for various dark sectors produced in $e^+e^-$ annihilation and
meson decay processes. In this talk, we report the search for $K_s^0$ invisible decay
and $\Sigma\to p+invisible$, search for Axion-like particle with $J/\Psi$ data, search for Z'
invisible decay via $J/\Psi \to \mu^+\mu^-X$ and search for massless dark photon through the
charm FCNC process $D^0\to ωγ’$ and $D^0\toγγ’$.
