Observation of the decays ${\chi }_{cJ}\to \varphi \varphi \eta$

Abstract

Using a data sample of $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ decays collected by the BESIII detector at the Beijing Electron Positron Collider (BEPCII), we observe the decays ${\chi }_{cJ}\to \varphi \varphi \eta (J=0,1,2)$, where the ${\chi }_{cJ}$ are produced via the radiative processes $\psi (3686)\to \gamma {\chi }_{cJ}$. The branching fractions are measured to be $\mathcal{B}({\chi }_{c0}\to \varphi \varphi \eta )=(8.41\pm 0.74\pm 0.62)\times 10^{-4}$, $\mathcal{B}({\chi }_{c1}\to \varphi \varphi \eta )=(2.96\pm 0.43\pm 0.22)\times 10^{-4}$, and $\mathcal{B}({\chi }_{c2}\to \varphi \varphi \eta )=(5.33\pm 0.52\pm 0.39)\times 10^{-4}$, where the first uncertainties are statistical and the second are systematic. We also search for intermediate states in the $\varphi \varphi$ or $\eta \varphi$ combinations, but no significant structure is seen due to the limited statistics.

arXiv comment10 pages,5 figures,

References in corpus (17)

• 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
• Quarkonia and their transitions
• 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
• Determination of the number of $\psi (3686)$ events at BESIII
• Trigger efficiencies at BES III
• Possible Hints and Search for Glueball Production in Charmless Rare B Decays
• Evidence for η_{c}(2S) in ψ(3686) \to γK_{S}^{0}K^{\pm}π^{\mp}π^{+}π^{-}
• Observation of B -> phi phi K
• Study of $J/\psi$ and $\psi (3686)$ decays to ${\pi }^{+}{\pi }^{-}{\eta }^{\prime }$
• Evidence for $e^{+}{e}^{-}\to \gamma {\chi }_{c1,2}$ at center-of-mass energies from 4.009 to 4.360 GeV
• Observation of the $B_s^0\to J/\psi \varphi \varphi$ decay
• Improved measurements of two-photon widths of the ${\chi }_{cJ}$ states and helicity analysis for ${\chi }_{c2}\to \gamma \gamma$
• Measurement of $e^{+}{e}^{-}\to \gamma {\chi }_{cJ}$ via initial state radiation at Belle
• Observation of B+ -> Phi Phi K+ and evidence for B0 -> Phi Phi K0 below Eta_C threshold

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