# Dark matter/new physics searches at BESIII

## TL;DR

BESIII has conducted searches for light Higgs, dark bosons, and invisible meson decays predicted by models beyond the Standard Model, using data from various charmonium resonances to explore potential new physics signals.

## Contribution

This paper reports recent experimental searches at BESIII for light weak-interacting particles and invisible meson decays, providing new constraints on beyond Standard Model physics.

## Key findings

- No significant signals found for light Higgs or dark bosons.
- Constraints set on the coupling and mass parameters of new light particles.
- Limits established on invisible decay branching fractions of mesons.

## Abstract

Many new physics models beyond the Standard Model, motivated by the recent astrophysical anomalies, include the possibility of several new types of light weak-interacting particles. Typical models, such as Next-to-Minimal Supersymmetric Standard Model and Hidden Dark-sector Model, predict the light Higgs and dark bosons, respectively. The masses of these particles are expected to be a few GeV and thus making them accessible at BESIII. BESIII has recently explored the possibility of light Higgs and dark bosons in several decay modes using the data-sets collected at $J/\psi$, $\psi(3686)$ and $\psi(3770)$ resonances. The $J/\psi$ data have further utilized to search for invisible decays of light vector ($V=\omega, \phi$) and pseudo-scalar ($P=\eta, \eta'$) mesons via $J/\psi \to VP$ decays. This report summarizes the recent results of the BESIII experiment on these new physics topics.