Search for $\psi (3686)\to \gamma {\eta }_c(\eta (1405))\to \gamma {\pi }^{+}{\pi }^{-}{\pi }^0$

Abstract

Using a sample of $448.1\times 10^6$ $\psi (3686)$ events collected with the BESIII detector, a search for the isospin violating decay ${\eta }_c\to {\pi }^{+}{\pi }^{-}{\pi }^0$ via $\psi (3686)\to \gamma {\eta }_c$ is presented. No signal is observed, and the upper limit on $\mathcal{B}(\psi (3686)\to \gamma {\eta }_c\to \gamma {\pi }^{+}{\pi }^{-}{\pi }^0)$ is determined to be $1.6\times 10^{-6}$ at the $90\%$ confidence level. In addition, a search for $\eta (1405)\to f_0(980){\pi }^0$ in $\psi (3686)$ radiative decays is performed. No signal is observed, and the branching fraction $\mathcal{B}(\psi (3686)\to \gamma \eta (1405)\to \gamma f_0(980){\pi }^0\to \gamma {\pi }^{+}{\pi }^{-}{\pi }^0)$ is calculated to be less than $5.0\times 10^{-7}$ at the $90\%$ confidence level.

References in corpus (18)

• 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
• Search for hadronic transition ${\chi }_{cJ}\to {\eta }_c{\pi }^{+}{\pi }^{-}$ and observation of ${\chi }_{cJ}\to K\bar{K}\pi \pi \pi$
• The puzzle of anomalously large isospin violations in $\eta (1405/1475)\to 3\pi$
• Searching for observable effects induced by anomalous triangle singularities
• First observation of $\eta (1405)$ decays into $f_0(980){\pi }^0$
• Understanding the property of $\eta (1405/1475)$ in the $J/\psi$ radiative decay
• Study of $J/\psi$ and $\psi (3686)$ decay to $\Lambda \bar{\Lambda }$ and ${\Sigma }^0{\bar{\Sigma }}^0$ final states
• An amplitude analysis of the ${\pi }^0{\pi }^0$ system produced in radiative $J/\psi$ decays
• Determination of the number of ${\psi }^{\prime }$ event at BESIII
• Measurement of the Matrix Elements for the Decays $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\eta /{\eta }^{\prime }\to {\pi }^0{\pi }^0{\pi }^0$
• Measurement of B(J/psi->eta_c gamma) at KEDR
• Observation of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^0{\pi }^0$
• Measurement of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$
• Search for $\eta$ and ${\eta }^{\prime }$ Invisible Decays in $J/\psi \to \varphi \eta$ and $\varphi {\eta }^{\prime }$
• Mixing of pseudoscalar mesons and isospin symmetry breaking
• Search for $\eta$ and ${\eta }^{\prime }\to {\pi }^{+}{e}^{-}{\bar{\nu }}_e+c.c.$ decays in $\jpsi \to ϕη$ and $\varphi {\eta }^{\prime }$

Cited by in corpus (9)

• Probing millicharge at BESIII
• Millicharged particles at electron colliders
• Probing invisible decay of dark photon at BESIII and future STCF via monophoton searches
• Precision measurement of the branching fractions of ${\eta }^{\prime }$ decays
• Probing the $L_{\mu }-L_{\tau }$ gauge boson at electron colliders
• Neutrino dipole portal at electron colliders
• Constraining nonstandard neutrino interactions at electron colliders
• Dark states with electromagnetic form factors at electron colliders
• Observation of $\psi (3686)\to \gamma \eta (1405)$ via $\eta (1405)\to f_0(980){\pi }^0$