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

• Published in: arXiv.org 2018-01
• Main Authors: collaboration, BESIII, Ablikim, M, Berger, N, Boyko, I, Cakir, O, Cetin, S A, Chelkov, G, Chen, H S, Dai, J P, Dbeyssi, A, Dedovich, D, Duan, P F, Fang, J, Feng, C Q, Gao, Y G, Garzia, I, Gong, W X, Hafner, A, He, K L, Held, T, Holtmann, T, T Hu, Huang, X T, Jin, D P, Kloss, B, Koch, L, Kuhlmann, M, Kühn, W, Lange, J S, Larin, P, Leng, C, C Li, F Li, Li, H B, Li, P L, Liang, Y F, Liu, H M, Liu, J P, Liu, J Y, Liu, Ke, Lou, X C, Luo, C L, T Ma, Maas, F E, Marcello, S, Mezzadri, G, Nefedov, Y, Nikolaev, I B, Nisar, S, Patteri, P, Qian, S, Qin, X S, Rong, G, Sarantsev, A, Savrié, M, Shen, C P, Song, J J, Song, W M, Sun, X H, Sun, Z J, Sun, Z T, Uman, I, Varner, G S, Wang, D, Wang, K, Wang, Y D, Wang, Z, Wang, Z Y, Wei, D H, Wiedner, U, Z Wu, Xia, Y, Xiao, Y J, Xie, Y G, Xu, X P, Yan, L, Yang, H J, Yang, L, Yang, Y X, You, Z Y, Yu, B X, Yu, J S, Yuan, C Z, Zhang, B X, Zhang, B Y, Zhang, J L, Zhang, S Q, Zhang, Y T, Zhao, Q, Zhao, Y B, Zhao, Z G, Zhemchugov, A, Zheng, J P, Zhou, L, Zhu, K, Zhu, K J, Zhu, Z A, Zotti, L, Zou, B S, Zou, J H
• Format: Article
• Language: English
• Subjects: Confidence intervals; Searching
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1707.05178

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.