Study of two-photon decays of pseudoscalar mesons via $J/\psi$ radiative decays

Abstract

Using a sample of $4.48\times 10^8$ $\psi (3686)$ events collected with the BESIII detector at the BEPCII collider, we study the two-photon decays of the pseudoscalar mesons ${\pi }^0$, $\eta$, ${\eta }^{\prime }$, $\eta (1405)$, $\eta (1475)$, $\eta (1760)$, and $X(1835)$ in $J/\psi$ radiative decays using $\psi (3686)\to {\pi }^{+}{\pi }^{-}J/\psi$ events. The ${\pi }^0$, $\eta$ and ${\eta }^{\prime }$ mesons are clearly observed in the two-photon mass spectra, and the branching fractions are determined to be $B(J/\psi \to \gamma {\pi }^0\to 3\gamma )=(3.57\pm 0.12\pm 0.16)\times 10^{-5}$, $B(J/\psi \to \gamma \eta \to 3\gamma )=(4.42\pm 0.04\pm 0.18)\times 10^{-4}$, and $B(J/\psi \to \gamma {\eta }^{\prime }\to 3\gamma )=(1.26\pm 0.02\pm 0.05)\times 10^{-4}$, where the first errors are statistical and the second systematic. No clear signal for $\eta (1405)$, $\eta (1475)$, $\eta (1760)$ or $X(1835)$ is observed in the two-photon mass spectra, and upper limits at the $90\%$ confidence level on the product branching fractions are obtained.

References in corpus (26)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• The glueball spectrum from an anisotropic lattice study
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Glueball Spectrum and Matrix Elements on Anisotropic Lattices
• A comprehensive lattice study of SU(3) glueballs
• Search for hadronic transition ${\chi }_{cJ}\to {\eta }_c{\pi }^{+}{\pi }^{-}$ and observation of ${\chi }_{cJ}\to K\bar{K}\pi \pi \pi$
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Study of ${\chi }_{cJ}$ radiative decays into a vector meson
• X(1835) as the Lowest Mass Pseudoscalar Glueball and Proton Spin Problem
• Chiral Suppression of Scalar Glueball Decay
• Determination of the number of $\psi (3686)$ events at BESIII
• Antiproton-Proton Channels in J/psi Decays
• Categorizing resonances X(1835), X(2120) and X(2370) in the pseudoscalar meson family
• An amplitude analysis of the ${\pi }^0{\pi }^0$ system produced in radiative $J/\psi$ decays
• Observation of an anomalous line shape of the ${\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ mass spectrum near the $p\bar{p}$ mass threshold in $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$
• A possible 0^{-+} glueball candidate X(1835)
• Determination of the number of ${\psi }^{\prime }$ event at BESIII
• Charmonium decays to gamma pi0, gamma eta, and gamma eta'
• Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega
• ${\eta }_c$ - glueball Mixing and Resonance X(1835)
• Partial Wave Analysis of $J/\psi \to \gamma (K^{\pm }{K}_S^0{\pi }^{\mp })$
• Productions of X(1835) as baryonium with sizable gluon content
• Determination of the total absorption peak in an electromagnetic calorimeter
• Measurement of the branching fractions for $J/\psi \to \gamma {\pi }^0$, $\gamma \eta$ and $\gamma {\eta }^{\prime }$
• Gluonic Mesons in J/Psi Radiative Decay

Cited by in corpus (3)

• Short-distance constraints on hadronic light-by-light scattering in the anomalous magnetic moment of the muon
• Amplitude analysis and branching fraction measurement of $D_s^{+}\to K^{-}{K}^{+}{\pi }^{+}{\pi }^0$
• Amplitude analysis and branching-fraction measurement of $D_s^{+}\to K_S^0{K}^{-}{\pi }^{+}{\pi }^{+}$