Search for a $CP$-odd light Higgs boson in $J/\psi \to \gamma A^0$

Abstract

Using $J/\psi$ radiative decays from 9.0 billion $J/\psi$ events collected by the BESIII detector, we search for di-muon decays of a $CP$-odd light Higgs boson ($A^0$), predicted by many new physics models beyond the Standard Model, including the Next-to-Minimal Supersymmetric Standard Model. No evidence for the $CP$-odd light Higgs production is found, and we set $90\%$ confidence level upper limits on the product branching fraction $\mathcal{B}(J/\psi \to \gamma A^0)\times \mathcal{B}(A^0\to {\mu }^{+}{\mu }^{-})$ in the range of $(1.2-778.0)\times 10^{-9}$ for $0.212\le m_{A^0}\le 3.0$ GeV/$c^2$. The new measurement is a 6-7 times improvement over our previous measurement, and is also slightly better than the BaBar measurement in the low-mass region for $\tan \beta =1$.

9 pages, 5 figures, accepted by Phys. Rev. D

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Cited by in corpus (6)

• Search for di-photon decays of an axion-like particle in radiative $J/\psi$ decays
• Search for a light Higgs boson in single-photon decays of ${\rm Y}(1S)$ using ${\rm Y}(2S)\to {\pi }^{+}{\pi }^{-}{\rm Y}(1S)$ tagging method
• Constraints on axion-like particles using lattice QCD calculations of the rate for $J/\psi \to \gamma a$
• Highlights of recent BESIII results
• Isospin violating decays of vector charmonia
• Lattice determination of the neutrino background for $J/\psi \to \gamma +\text{invisible}$