Search for the semileptonic decay $D^{0(+)}\to b_1(1235)^{-(0)} e^+ν_e$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Ahmed, S.
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name: Anita
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name: Ferroli, R. Baldini
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name: Berger, N.
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name: Chang, J. F.
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name: Chelkov, G.
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name: Chen, M. L.
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name: de Boer, R. B.
name: Dedovich, D.
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name: De Mori, F.
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name: Dong, J.
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name: Dong, M. Y.
name: Du, S. X.
name: Fang, J.
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name: Fang, Y.
name: Farinelli, R.
name: Fava, L.
name: Feldbauer, F.
name: Felici, G.
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name: Fritsch, M.
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name: Gao, Y.
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name: Gao, Y.
name: Gao, Y. G.
name: Garzia, I.
name: Gersabeck, E. M.
name: Gilman, A.
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name: Gong, L.
name: Gong, W. X.
name: Gradl, W.
name: Greco, M.
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name: Guan, C. Y
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name: Guo, Y. P.
name: Guskov, A.
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name: Harris, F. A.
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name: Heinsius, F. H.
name: Heinz, C. H.
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name: Zhang, Jianyu
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name: Zhang, Lei
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name: Zhong, B.
name: Zhong, C.
name: Zhou, L. P.
name: Zhou, Q.
name: Zhou, X.
name: Zhou, X. K.
name: Zhou, X. R.
name: Zhu, A. N.
name: Zhu, J.
name: Zhu, K.
name: Zhu, K. J.
name: Zhu, S. H.
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name: Zou, J. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using $2.93~\mathrm{fb}^{-1}$ of $e^+e^-$ annihilation data collected at a center-of-mass energy $\sqrt{s}=3.773$ GeV with the BESIII detector operating at the BEPCII collider, we search for the semileptonic $D^{0(+)}$ decays into a $b_1(1235)^{-(0)}$ axial-vector meson for the first time. No significant signal is observed for either charge combination. The upper limits on the product branching fractions are ${\mathcal B}_{D^0\to b_1(1235)^- e^+ν_e}\cdot {\mathcal B}_{b_1(1235)^-\to ωπ^-}&lt;1.12\times 10^{-4}$ and ${\mathcal B}_{D^+\to b_1(1235)^0 e^+ν_e}\cdot {\mathcal B}_{b_1(1235)^0\to ωπ^0}&lt;1.75\times 10^{-4}$ at the 90\% confidence level.
description: 9 pages, 3 figures