Search for new light vector boson using $J/\Psi$ at BESIII and Belle II

Kayoung Ban, Yongsoo Jho, Youngjoon Kwon +3

We investigate various search strategies for light vector boson $X$ in $\mathcal{O}(10)\mathrm{MeV}$ mass range using $J/\Psi$ associated channels at BESIII and Belle II: (i) $J/Ψ\to η_…