Observation of the electromagnetic doubly OZI-suppressed decay $J/\psi \to \varphi {\pi }^0$

Abstract

Using a sample of $1.31$ billion $J/\psi$ events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay $J/\psi \to \varphi {\pi }^0$, which is the first evidence for a doubly Okubo-Zweig-Iizuka suppressed electromagnetic $J/\psi$ decay. A clear structure is observed in the $K^{+}{K}^{-}$ mass spectrum around 1.02 GeV/$c^2$, which can be attributed to interference between $J/\psi \to \varphi {\pi }^0$ and $J/\psi \to K^{+}{K}^{-}{\pi }^0$ decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of $J/\psi \to \varphi {\pi }^0$ are $[2.94\pm 0.16\text{(stat.)}\pm 0.16\text{(syst.)}]\times 10^{-6}$ and $[1.24\pm 0.33\text{(stat.)}\pm 0.30\text{(syst.)}]\times 10^{-7}$.

arXiv comment7 pages, 4 figures, published in Phys. Rev. D

References in corpus (7)

• Design and Construction of the BESIII Detector
• A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta' meson
• Observation of a near-threshold enhancement in the ωϕmass spectrum from the doubly OZI suppressed decay J/ψ\to γωϕ
• J/psi->VP decays and the quark and gluon content of the eta and eta'
• Study of the near-threshold $\omega \varphi$ mass enhancement in doubly OZI suppressed $J/\psi \to \gamma \omega \varphi$ decays
• Study of electromagnetic decay of $J/\psi$ and ${\psi }^{\prime }$ to vector and pseudoscalar
• Measurements of J/psi decays into phi pi^0, phi eta, and phi eta^prime

Cited by in corpus (3)

• Partial-wave analysis of $J/\psi \to K^{+}{K}^{-}{\pi }^0$
• Dispersive analysis of the $J/\psi \to {\pi }^0{\gamma }^{\ast }$ transition form factor with $\rho$-$\omega$ mixing effects
• Studies of Charmonium at BESIII