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 (2)

• Observation of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\pi }^0{\pi }^0$
• 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 (6)

• 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 $\eta (1405)\to f_0(980){\pi }^0$