Key points are not available for this paper at this time.
The Belle II experiment at the SuperKEKB e^+e^- collider has a unique sensitivity for a broad class of dark sector particles with masses in the MeV–GeV range. This paper presents the latest results from Belle II searches for dark sector mediators and their decays to dark or Standard Model particles using the dataset collected until July 2022.
M. Campajola (Tue,) studied this question.