Search for a light CP-odd Higgs boson in the radiative decays of J/psi

The BESIII Collaboration, M. Ablikim

We search for a light Higgs boson $A^0$ in the fully reconstructed decay chain of $J/\psi \to \gamma A^0$, $A^0\to {\mu }^{+}{\mu }^{-}$ using $(225.0\pm 2.8)\times 10^6$ $J/\psi$ events colle…