Observation of \(\psi(3686)\to p\bar{p}\phi\)

• Published in: arXiv.org 2019-02
• Main Authors: Berger, N, Bettoni, D, Cetin, S A, Chang, J F, Chang, W L, Chen, M L, Dai, H L, Denysenko, I, Feng, C Q, Gao, X L, Gao, Y, Goetzen, K, Gong, L, Gradl, W, Gu, M H, Guo, A Q, Guskov, A, He, K L, Hu, J F, Ji, Q P, Ji, X L, Jiang, H L, Jiang, X S, Johansson, T, Kappert, R, Ke, B C, Kupsc, A, Kurth, M, Kühn, W, Li, D M, F Li, Li, H B, Li, Z B, Liao, L Z, Lin, Y J, Liu, B J, HuanhuanLiu, Liu, X, Liu, X Y, Luo, X L, Lusso, S, Lyu, X R, Ma, X N, Maggiora, M, Marcello, S, Messchendorp, J G, N Yu Muchnoi, Nakhoul, S, Nikolaev, I B, Pacetti, S, Papenbrock, M, Pelizaeus, M, Peters, K, Pettersson, J, Prasad, V, Qi, T Y, Rashid, K H, Richter, M, Rivetti, A, Rump, M, Schoenning, K, Shen, X Y, Sun, J F, Sun, L, Sun, Y J, Tang, G Y, Tang, X, Wang, C W, Wang, D Y, Wang, K, Wang, R M, Wang, W P, Wang, Z G, Wen, H W, Wen, S P, Xiu, Q L, Yan, W C, Yang, Y H, Yang, Y X, YifanYang, Yin, J H, You, Z Y, Yu, B X, Yuan, C Z, Zhang, B X, Zhang, B Y, Zhang, J W, Zhang, Y T, Zhang, Z P, Zhang, Z Y, Zhao, J Y, Zhao, J Z, Zhao, Q, Zhao, T C, Zheng, B, Zhou, L, Zhou, X K, Zhou, X R, XiaoyuZhou, Zhu, X L
• Format: Article
• Language: English
• Subjects: Confidence intervals
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1902.09756

Using a data sample of \(4.48\times10^{8}\) \(\psip\) events collected with the BESIII detector, we present a first observation of \(\psi(3686)\to p\bar{p}\phi\), and we measure its branching fraction to be \([6.06\pm0.38 (\)stat.\() \pm 0.48 (\)syst.\()]\times10^{-6}\). In contrast to the earlier discovery of a threshold enhancement in the \(p\bar{p}\)-mass spectrum of the channel \(J/\psi\to\gamma p\bar p\), denoted as \(X(p\bar{p})\), we do not find a similar enhancement in \(\psi(3686)\to p\bar{p}\phi\). An upper limit of \(1.82\times10^{-7}\) at the \(90\%\) confidence level on the branching fraction of \(\psi(3686)\to X(p\bar{p})\phi\to p\bar{p}\phi\) is obtained.