Dark sector search at BESIII

TL;DR

This paper reports recent experimental searches for dark sector particles at BESIII, including axion-like particles, muon-philic particles, massless dark photons, and invisible decays, aiming to uncover physics beyond the Standard Model.

Contribution

It presents new experimental results from BESIII on various dark sector particles, expanding the search for physics beyond the Standard Model.

Findings

No significant signals observed in the searched channels.

Constraints set on the coupling strengths of dark sector particles.

Improved limits on dark photon and axion-like particle parameters.

Abstract

The Standard Model has achieved significant success in particle physics; however, there are still some unresolved puzzles beyond it. This motivates the exploration of the dark sector. We present the recent dark sector search results from BESIII experiment, which include the search for axion-like particles in the $J/\psi$ data set, the search for muon-philic particles in muon radiation, the search for massless dark photons in $D^0\to\omega\gamma'$ and $D^0\to\gamma\gamma'$, and the search for invisible decays of $K^0_S$.