Search for the decay ${\eta }^{\prime }\to \gamma \gamma \eta$

Abstract

Using a data sample of $1.31\times 10^{9}J/\psi$ events collected with the BESIII detector, a search for ${\eta }^{\prime }\to \gamma \gamma \eta$ via $J/\psi \to \gamma {\eta }^{\prime }$ is performed for the first time. No significant ${\eta }^{\prime }$ signal is observed in the $\gamma \gamma \eta$ invariant mass spectrum, and the %upper limit of the branching fraction of ${\eta }^{\prime }\to \gamma \gamma \eta$ is determined to be less than $1.33\times 10^{-4}$ at the 90$\%$ confidence level.

References in corpus (14)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Isospin Violation in Chiral Perturbation Theory and the Decays $η\ra π\ell ν$ and $τ\ra ηπν$
• Determination of the number of $J/\psi$ events with inclusive $J/\psi$ decays
• Observation of the Dalitz Decay ${\eta }^{\prime }\to \gamma e^{+}{e}^{-}$
• Measurement of the Matrix Elements for the Decays $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\eta /{\eta }^{\prime }\to {\pi }^0{\pi }^0{\pi }^0$
• Precision Study of ${\eta }^{\prime }\to \gamma {\pi }^{+}{\pi }^{-}$ Decay Dynamics
• Observation of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^0{\pi }^0$
• Measurement of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$
• Measurement of the matrix elements for the decays ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }\to \eta {\pi }^0{\pi }^0$
• Observation of the doubly radiative decay ${\eta }^{\prime }\to \gamma \gamma {\pi }^0$
• Study of $J/\psi$ and $\psi (3686)$ decays to ${\pi }^{+}{\pi }^{-}{\eta }^{\prime }$
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III

Cited by in corpus (5)

• Neutron Stars with Baryon Number Violation, Probing Dark Sectors
• A theoretical analysis of the doubly radiative decays ${\eta }^{(\prime )}\to {\pi }^0\gamma \gamma$ and ${\eta }^{\prime }\to \eta \gamma \gamma$
• The semileptonic decays ${\eta }^{(\prime )}\to {\pi }^0{\ell }^{+}{\ell }^{-}$ and ${\eta }^{\prime }\to \eta {\ell }^{+}{\ell }^{-}$ in the standard model
• Neutron star structure with a new force between quarks
• Sensitivity of the ${\eta }^{(\prime )}\to {\pi }^0\gamma \gamma$ and ${\eta }^{\prime }\to \eta \gamma \gamma$ decays to a sub-GeV leptophobic $U(1{)}_B$ boson