Search for rare decay $J/\psi \to \varphi e^{+}{e}^{-}$

Abstract

Using a data sample of $448.1\times 10^6$ $\psi (3686)$ events collected at $\sqrt{s}=$ 3.686 GeV with the BESIII detector at the BEPCII, we search for the rare decay $J/\psi \to \varphi e^{+}{e}^{-}$ via $\psi (3686)\to {\pi }^{+}{\pi }^{-}J/\psi$. No signal events are observed and the upper limit on the branching fraction is set to be $\mathcal{B}(J/\psi \to \varphi e^{+}{e}^{-})<1.2\times 10^{-7}$ at the 90\% confidence level, which is still about one order of magnitude higher than the Standard Model prediction.

7 pages, 3 figures

References in corpus (11)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• 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
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Study of ${\chi }_{cJ}$ radiative decays into a vector meson
• Determination of the number of $\psi (3686)$ events at BESIII
• Psi(2S) -> pi^+ pi^- J/psi Decay Distributions
• Observation of Electromagnetic Dalitz decays J/ψ\to P e^+e^-
• Measurement of $\mathcal{B}(J/\psi \to {\eta }^{\prime }{e}^{+}{e}^{-}$) and search for a dark photon
• Study of the rare decay $J/\psi \to e^{+}{e}^{-}\varphi$

Cited by in corpus (1)

• QCD analysis of the $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$