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  • Observation of the \(J/\psi\) and \(\psi(3686)\) decays into \(\eta\Sigma^{+}\bar{\Sigma}^{-}\)
    Ablikim, M; Bloms, J; Chang, J F; Chen, C; Chen, Z J; Denysenko, I; Dong, J; Egorov, P; Fu, C D; Gao, Y N; Gilman, A; Gong, W X; Greco, M; Gu, Y T; Guo, Y P; Guskov, A; He, K K; Heinz, C H; Herold, C; Holtmann, T; Hou, Y R; Hu, J F; Hussain, T; Irshad, M; Jaeger, S; Kang, X L; Kavatsyuk, M; Kolcu, O B; Kopf, B; Lane, J J; Lavania, A; Li, D M; F Li; Li, H N; Li, J W; Li, L J; Li, P R; T Li; Liao, G R; Liao, L Z; Liu, Huanhuan; Liu, Huihui; Liu, L C; Liu, P L; Liu, Q; Liu, W M; Lu, J G; Maas, F E; Mao, Z P; Miao, H; Nefedov, Y; Nikolaev, I B; Nisar, S; Niu, Y; Peters, K; Qin, J J; Qin, X S; Qiu, J F; Schelhaas, Y; Shen, C P; Shen, H F; Shi, B A; Shi, J Y; Shi, Q Q; Song, Y X; Sun, G X; Sun, Y Z; Tan, Y X; Tao, L Y; Wang, H P; Wang, Y D; Wang, Yaqian; Xia, L; Xiang, T; Xie, Y G; Xing, T Y; Xu, G F; Xu, X P; Yan, F; Yang, Tao; Yang, Yifan; Yu, C X; Yuan, L; Yuan, Z Y; Zafar, A A; Zhang, H; Zhang, H H; Zhang, H Q; Zhang, H Y; Zhang, X D; Zhang, Yan; Zhang, Yao; Zhao, J; Zhao, J Y; Zhao, S J; Zhao, Y B; Zheng, B; Zhou, H; Zhou, L P; Zhou, X K

    arXiv.org, 12/2022
    Paper

    The decays \(J/\psi\to\eta\Sigma^{+}\bar{\Sigma}{}^-\) and \(\psi(3686)\to\eta\Sigma^{+}\bar{\Sigma}{}^-\) are observed for the first time, using \((10087 \pm 44)\times 10^{6}\) \(J/\psi\) and \((448.1 \pm 2.9)\times 10^{6}\) \(\psi(3686)\) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be \({\cal B}(J/\psi\to\eta\Sigma^{+}\bar{\Sigma}{}^-)=(6.34 \pm 0.21 \pm 0.37)\times 10^{-5}\) and \({\cal B}(\psi(3686)\to\eta\Sigma^{+}\bar{\Sigma}{}^-)=(9.59 \pm 2.37 \pm 0.61)\times 10^{-6}\), where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be \(\frac{{\cal B}(\psi(3686)\to\eta\Sigma^{+}\bar{\Sigma}{}^-)}{{\cal B}(J/\psi\to\eta\Sigma^{+}\bar{\Sigma}{}^-)}=(15.1 \pm 3.8)\%\), which is in agreement with the "12\% rule."

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