Search for $\psi(3686)\to \gamma\eta_c(\eta(1405))\to \gamma \pi^{+}\pi^{-}\pi^{0}$
Abstract
Using a sample of $448.1\times10^{6}$ $\psi(3686)$ 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 $1.6\times10^{-6}$ 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\times10^{-7}$ at the $90\%$ confidence level.
- Publication:
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arXiv e-prints
- Pub Date:
- July 2017
- DOI:
- 10.48550/arXiv.1707.05178
- arXiv:
- arXiv:1707.05178
- Bibcode:
- 2017arXiv170705178B
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- Phys. Rev. D 96, 112008 (2017)