Study of the decay $D^0\rightarrow \bar{K}^0π^-e^+ν_e$
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
name: Ban, Y.
name: Begzsuren, K.
name: Bennett, D. W.
name: Bennett, J. V.
name: Berger, N.
name: Bertani, M.
name: Bettoni, D.
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name: Boger, E.
name: Boyko, I.
name: Briere, R. A.
name: Cai, H.
name: Cai, X.
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.
name: Cibinetto, G.
name: Cossio, F.
name: Dai, H. L.
name: Dai, J. P.
name: Dbeyssi, A.
name: Dedovich, D.
name: Deng, Z. Y.
name: Denig, A.
name: Denysenko, I.
name: Destefanis, M.
name: De Mori, F.
name: Ding, Y.
name: Dong, C.
name: Dong, J.
name: Dong, L. Y.
name: Dong, M. Y.
name: Dou, Z. L.
name: Du, S. X.
name: Duan, P. F.
name: Fang, J.
name: Fang, S. S.
name: Fang, Y.
name: Farinelli, R.
name: Fava, L.
name: Feldbauer, F.
name: Felici, G.
name: Feng, C. Q.
name: Fritsch, M.
name: Fu, C. D.
name: Gao, Q.
name: Gao, X. L.
name: Gao, Y.
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name: Gao, Z.
name: Garillon, B.
name: Garzia, I.
name: Gilman, A.
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name: Gong, W. X.
name: Gradl, W.
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name: Guo, R. P.
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name: Guskov, A.
name: Haddadi, Z.
name: Han, S.
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name: Harris, F. A.
name: He, K. L.
name: Heinsius, F. H.
name: Held, T.
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name: Hou, Z. L.
name: Hu, H. M.
name: Hu, J. F.
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name: Huang, J. S.
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name: Hussain, T.
name: Andersson, W. Ikegami
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name: Johansson, T.
name: Kalantar-Nayestanaki, N.
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name: Liu, Huihui
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name: Liu, Ke
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name: Liu, Z. A.
name: Liu, Zhiqing
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name: Zhang, L.
name: Zhang, S. F.
name: Zhang, T. J.
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.
name: Zhu, Y. C.
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: We report a study of the decay $D^0 \rightarrow \bar{K}^0π^-e^+ν_{e}$ based on a sample of $2.93~\mathrm{fb}^{-1}$ $e^+e^-$ annihilation data collected at the center-of-mass energy of 3.773~GeV with the BESIII detector at the BEPCII collider. The total branching fraction is determined to be $\mathcal{B}(D^0\rightarrow \bar{K}^0π^-e^+ν_{e})=(1.434\pm0.029({\rm stat.})\pm0.032({\rm syst.}))\%$, which is the most precise to date. According to a detailed analysis of the involved dynamics, we find this decay is dominated with the $K^{*}(892)^-$ contribution and present an improved measurement of its branching fraction to be $\mathcal{B}(D^0\rightarrow K^{*}(892)^-e^+ν_e)=(2.033\pm0.046({\rm stat.})\pm0.047({\rm syst.}))\%$. We further access their hadronic form-factor ratios for the first time as $r_{V}=V(0)/A_1(0)=1.46\pm0.07({\rm stat.})\pm0.02({\rm syst.})$ and $r_{2}=A_2(0)/A_1(0)=0.67\pm0.06({\rm stat.})\pm0.01({\rm syst.})$. In addition, we observe a significant $\bar{K}^0π^-$ $S$-wave component accounting for $(5.51\pm0.97({\rm stat.})\pm0.62({\rm syst.}))\%$ of the total decay rate.
description: 8 pages, 2 figures