Improved measurements of branching fractions for ${\eta }_c\to \varphi \varphi$ and $\omega \varphi$

Abstract

Using $(223.7\pm 1.4)\times 10^6$ J/$\psi$ events accumulated with the BESIII detector, we study ${\eta }_c$ decays to $\varphi \varphi$ and $\omega \varphi$ final states. The branching fraction of ${\eta }_c\to \varphi \varphi$ is measured to be $Br({\eta }_c\to \varphi \varphi )=(2.5\pm 0.3_{-0.7}^{+0.3}\pm 0.6)\times 10^{-3}$, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty of $Br(J/\psi \to \gamma {\eta }_c)$. No significant signal for the double OZI-suppressed decay of ${\eta }_c\to \omega \varphi$ is observed, and the upper limit on the branching fraction is determined to be $Br({\eta }_c\to \omega \varphi )<2.5\times 10^{-4}$ 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
• Study of ${\chi }_{cJ}$ radiative decays into a vector meson
• J/psi and psi(2S) Radiative Transitions to eta_c
• Determination of the number of $J/\psi$ events with inclusive $J/\psi$ decays
• The evasion of helicity selection rule in ${\chi }_{c1}\to VV$ and ${\chi }_{c2}\to VP$ via intermediate charmed meson loops
• Exclusive $et{a}_b$ decay to double $J/\psi$ at next-to-leading order in $alph{a}_s$
• Which hadronic decay modes are good for ${\eta }_b$ searching: double $J/\psi$ or something else?
• Pseudoscalar Quarkonium Exclusive Decays to Vector Meson Pair
• Observation of new resonant structures in $\gamma \gamma \to \omega \varphi$, $\varphi \varphi$ and $\omega \omega$
• Updated study of the ${\eta }_c$ and ${\eta }_c^{\prime }$ decays into light vector mesons
• Measurement of Branching Ratios for ${\eta }_c$ Hadronic Decays
• Experimental study of \etac decays into vector-vector final states

Cited by in corpus (1)

• Study of the Magnetic Dipole Transition of $J/\psi \to \gamma {\eta }_c$ via ${\eta }_c\to p\bar{p}$