Search for the lepton number violating decay $Σ^{-} \to p e^{-} e^{-}$ and the rare inclusive decay $Σ^{-} \to Σ^{+} X$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Ahmed, S.
name: Albrecht, M.
name: Aliberti, R.
name: Amoroso, A.
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name: Bai, X. H.
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name: Ferroli, R. Baldini
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name: Berger, N.
name: Bertani, M.
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name: Chang, W. L.
name: Chelkov, G.
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name: Chen, H. S.
name: Chen, M. L.
name: Chen, S. J.
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name: Chen, Y. B.
name: Chen, Z. J
name: Cheng, W. S.
name: Cibinetto, G.
name: Cossio, F.
name: Cui, X. F.
name: Dai, H. L.
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name: Dbeyssi, A.
name: de Boer, R. E.
name: Dedovich, D.
name: Deng, Z. Y.
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name: Destefanis, M.
name: De Mori, F.
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name: Dong, C.
name: Dong, J.
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name: Dong, M. Y.
name: Dong, X.
name: Du, S. X.
name: Fan, Y. L.
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: Feng, J. H.
name: Fritsch, M.
name: Fu, C. D.
name: Gao, Y.
name: Gao, Y.
name: Gao, Y.
name: Gao, Y. G.
name: Garzia, I.
name: Ge, P. T.
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name: Gersabeck, E. M.
name: Gilman, A
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name: Gong, L.
name: Gong, W. X.
name: Gradl, W.
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name: Harris, F. A.
name: Hüsken, N
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name: Liu, Fang
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name: Liu, Huanhuan
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name: Zhao, Z. G.
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name: Zheng, B.
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name: Zhou, L. P.
name: Zhou, Q.
name: Zhou, X.
name: Zhou, X. K.
name: Zhou, X. R.
name: Zhou, X. Y.
name: Zhu, A. N.
name: Zhu, J.
name: Zhu, K.
name: Zhu, K. J.
name: Zhu, S. H.
name: Zhu, T. J.
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Publisher: name: arXiv
Year: 2020
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 taken with the BESIII detector at the center-of-mass energy of 3.097 GeV, we search for the first time for the lepton number violating decay $Σ^{-} \to p e^{-} e^{-}$ and the rare inclusive decay $Σ^{-} \to Σ^{+} X$, where $X$ denotes any possible particle combination. The $Σ^-$ candidates are tagged in $J/ψ\to \barΣ(1385)^+Σ^-$ decays. No signal candidates are found, and the upper limits on the branching fractions at the 90\% confidence level are determined to be $\mathcal{B}(Σ^{-} \to p e^{-} e^{-}) &lt; 6.7 \times 10^{-5}$ and $\mathcal{B}(Σ^{-} \to Σ^{+} X) &lt; 1.2 \times 10^{-4}$.