Search for the decay $D_s^+\to a_0(980)^0e^+ν_e$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Ahmed, S.
name: Albrecht, M.
name: Aliberti, R.
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name: Ferroli, R. Baldini
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name: Cibinetto, G.
name: Cossio, F.
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name: De~Mori, F.
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name: Fang, Y.
name: Farinelli, R.
name: Fava, L.
name: Feldbauer, F.
name: Felici, G.
name: Feng, C. Q.
name: Feng, J. H.
name: Fritsch, M.
name: Fu, C. D.
name: Gao, Y.
name: Gao, Y.
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name: Gao, Y. G.
name: Garzia, I.
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name: Geng, C.
name: Gersabeck, E. M.
name: Gilman, A
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name: Guskov, A.
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Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using 6.32 fb$^{-1}$ of electron-positron collision data recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226~GeV, we present the first search for the decay $D_s^+\to a_0(980)^0 e^+ν_e,\,a_0(980)^0\rightarrow π^0η$, which could proceed via $a_0(980)$-$f_0(980)$ mixing. No significant signal is observed. An upper limit of $1.2 \times 10^{-4}$ at the $90\%$ confidence level is set on the product of the branching fractions of $D_{s}^{+}\to a_0(980)^0 e^+ν_e$ and $a_0(980)^0\rightarrow π^0η$ decays.
description: 9 pages, 4 figures