Search for the $X(2370)$ and observation of ${\eta }_c\to \eta \eta {\eta }^{\prime }$ in $J/\psi \to \gamma \eta \eta {\eta }^{\prime }$

Abstract

Using a sample of $1.31\times 10^{9}J/\psi$ events collected with the BESIII detector, we perform a study of $J/\psi \to \gamma \eta \eta {\eta }^{\prime }$ to search for the $X(2370)$ and ${\eta }_c$ in the $\eta \eta {\eta }^{\prime }$ invariant mass distribution. No significant signal for the $X(2370)$ is observed, and we set an upper limit for the product branching fraction of $\mathcal{B}(J/\psi \to \gamma X(2370)\cdot \mathcal{B}(X(2370)\to \eta \eta {\eta }^{\prime })<9.2\times 10^{-6}$ at the 90% confidence level. A clear ${\eta }_c$ signal is observed for the first time, yielding a product branching fraction of $\mathcal{B}(J/\psi \to \gamma {\eta }_c)\cdot \mathcal{B}({\eta }_c\to \eta \eta {\eta }^{\prime })=(4.86\pm 0.62(stat.)\pm 0.45(sys.))\times 10^{-5}$.

arXiv commentarXiv admin note: text overlap with arXiv:1912.11253

References in corpus (23)

• 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
• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• 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 ${\chi }_{cJ}\to K\bar{K}\pi \pi \pi$
• The Experimental Status of Glueballs
• Towards the glueball spectrum from unquenched lattice QCD
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
• Determining the Gluonic Content of Isoscalar Mesons
• J/psi and psi(2S) Radiative Transitions to eta_c
• Decay of the pseudoscalar glueball into scalar and pseudoscalar mesons
• Determination of the number of $J/\psi$ events with inclusive $J/\psi$ decays
• Precision Study of ${\eta }^{\prime }\to \gamma {\pi }^{+}{\pi }^{-}$ Decay Dynamics
• Radiative Decay of Vector Quarkonium: Constraints on Glueballs and Light Gluinos
• Glueball spectrum from $N_f=2$ lattice QCD study on anisotropic lattices
• Search for a light exotic particle in J/psi radiative decays
• Measurement of B(J/psi->eta_c gamma) at KEDR
• Observation of the $X(2370)$ and search for the $X(2120)$ in $J/\psi \to \gamma K\bar{K}{\eta }^{\prime }$
• Hadronic decays of the (pseudo-)scalar charmonium states ${\eta }_c$ and ${\chi }_{c0}$ in the extended Linear Sigma Model

Cited by in corpus (2)

• An updated review of the new hadron states
• Nature of $X(2370)$