Search for invisible decays of $ω$ and $ϕ$ with $J/ψ$ data at BESIII
Creators: name: Ablikim, M.
name: Achasov, M. N.
name: Ahmed, S.
name: Albrecht, M.
name: Alekseev, M.
name: Amoroso, A.
name: An, F. F.
name: An, Q.
name: Bai, Y.
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name: Ferroli, R. Baldini
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name: Bennett, D. W.
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name: Boyko, I.
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name: Calcaterra, A.
name: Cao, G. F.
name: Cetin, S. A.
name: Chai, J.
name: Chang, J. F.
name: Chang, W. L.
name: Chelkov, G.
name: Chen, G.
name: Chen, H. S.
name: Chen, J. C.
name: Chen, M. L.
name: Chen, P. L.
name: Chen, S. J.
name: Chen, X. R.
name: Chen, Y. B.
name: Cheng, W.
name: Chu, X. K.
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name: Cossio, F.
name: Dai, H. L.
name: Dai, J. P.
name: Dbeyssi, A.
name: Dedovich, D.
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name: Denig, A.
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name: De Mori, F.
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name: Dong, M. Y.
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name: Fang, J.
name: Fang, S. S.
name: Fang, Y.
name: Farinelli, R.
name: Fava, L.
name: Fegan, S.
name: Feldbauer, F.
name: Felici, G.
name: Feng, C. Q.
name: Fioravanti, E.
name: Fritsch, M.
name: Fu, C. D.
name: Gao, Q.
name: Gao, X. L.
name: Gao, Y.
name: Gao, Y. G.
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name: Garillon, B.
name: Garzia, I.
name: Gilman, A.
name: Goetzen, K.
name: Gong, L.
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name: Han, S.
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name: Heinsius, F. H.
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name: Liu, Huanhuan
name: Liu, Huihui
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name: Zhang, X. Y.
name: Zhang, Y.
name: Zhang, Y. H.
name: Zhang, Y. T.
name: Zhang, Yang
name: Zhang, Yao
name: Zhang, Yu
name: Zhang, Z. H.
name: Zhang, Z. P.
name: Zhang, Z. Y.
name: Zhao, G.
name: Zhao, J. W.
name: Zhao, J. Y.
name: Zhao, J. Z.
name: Zhao, Lei
name: Zhao, Ling
name: Zhao, M. G.
name: Zhao, Q.
name: Zhao, S. J.
name: Zhao, T. C.
name: Zhao, Y. B.
name: Zhao, Z. G.
name: Zhemchugov, A.
name: Zheng, B.
name: Zheng, J. P.
name: Zheng, W. J.
name: Zheng, Y. H.
name: Zhong, B.
name: Zhou, L.
name: Zhou, Q.
name: Zhou, X.
name: Zhou, X. K.
name: Zhou, X. R.
name: Zhou, X. Y.
name: Zhou, Xiaoyu
name: Zhou, Xu
name: Zhu, A. N.
name: Zhu, J.
name: Zhu, J.
name: Zhu, K.
name: Zhu, K. J.
name: Zhu, S.
name: Zhu, S. H.
name: Zhu, X. L.
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name: Zhu, Y. S.
name: Zhu, Z. A.
name: Zhuang, J.
name: Zou, B. S.
name: Zou, J. H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using a data sample of $(1310.6 \pm 7.0)\times 10^6$ $J/ψ$ events collected with the BESIII detector operating at the BEPCII collider, we perform the first experimental search for invisible decays of a light vector meson ($V=ω,ϕ$) via $J/ψ\to V η$ decays. The decay of $η\to π^+π^-π^0$ is utilized to tag the $V$ meson decaying into the invisible final state. No evidence for a significant invisible signal is observed, and the upper limits on the ratio of branching fractions at the 90\% confidence level are determined to be $\frac{\mathcal{B}(ω\rightarrow \rm{invisible})}{\mathcal{B}(ω\to π^+π^-π^0)} &lt; 8.1 \times 10^{-5}$ and $\frac{\mathcal{B}(ϕ\to \rm{invisible})}{\mathcal{B}(ϕ\to K^+K^-)} &lt; 3.4\times 10^{-4}$. By using the world average values of $\mathcal{B}(ω\to π^+π^-π^0)$ and $\mathcal{B}(ϕ\to K^+K^-)$, the upper limits on the decay branching fractions at the $90\%$ confidence level are set as $\mathcal{B}(ω\to \rm{invisible})&lt; 7.3 \times 10^{-5}$ and $\mathcal{B}(ϕ\to \rm{invisible})&lt; 1.7\times 10^{-4}$, respectively.
description: 10 pages, 6 figures