Search for invisible decays at BESIII

Abstract

Search for physics beyond the standard model is a highly topical in modern particle physics. So far, BESIII experiment has collected the world’s largest data sets at the 𝐽 / 𝜓 and 𝜓 (3686) resonances. The huge data samples and a clean reaction environment provide a ideal place to search for new physics. We report recent searches of the invisible decays 𝐽 / 𝜓 → 𝛾 + invisible and the first search for the Λ → invisible in the baryon sector.