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Observation of the double Dalitz decay η′ →e+e-e+e-

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Date

2022

Author

Ablikim, M.
Achasov, M.N.
Adlarson, P.
Albrecht, M.
Cetin, S.A.
Kolcu, O.B.

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Citation

Ablikim, M., Achasov, M. N., Adlarson, P., Albrecht, M., Aliberti, R., Amoroso, A., ... & Kalantar-Nayestanaki, N. (2022). Observation of the double Dalitz decay $\eta'\to e^+ e^-e^+ e^-$. arXiv preprint arXiv:2203.12229.

Abstract

Based on (10087±44)×106 J/ψ events collected with the BESIII detector at BEPCII, the double Dalitz decay η′→e+e-e+e-is observed for the first time via the J/ψ→γη′ decay process. The significance is found to be 5.7σ with systematic uncertainties taken into consideration. Its branching fraction is determined to be B(η′→e+e-e+e-)=(4.5±1.0(stat)±0.5(sys))×10-6. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Source

Physical Review D

Volume

105

Issue

11

URI

https://doi.org/10.1103/PhysRevD.105.112010
https://hdl.handle.net/20.500.12713/3042

Collections

  • Scopus İndeksli Yayınlar Koleksiyonu [1911]
  • WoS İndeksli Yayınlar Koleksiyonu [1982]



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