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Observation of the electromagnetic Dalitz decay D 0 → D0e + e −

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Date

2021

Author

Ablikim, M.
Achasov, M.N.
Adlarson, P.
Ahmed, S.
Kolcu, O. B.

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Citation

Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., . . . Zou, J. H. (2021). Observation of the electromagnetic dalitz decay D∗0 →d0e+e-. Physical Review D, 104(11)

Abstract

Based on 3.19 fb-1 of e+e- collision data accumulated at the center-of-mass energy 4.178 GeV with the BESIII detector operating at the BEPCII collider, the electromagnetic Dalitz decay D∗0→D0e+e- is observed for the first time with a statistical significance of 13.2σ. The ratio of the branching fraction of D∗0→D0e+e- to that of D∗0→D0γ is measured to be (11.08±0.76±0.49)×10-3. By using the world average value of the branching fraction of D∗0→D0γ, the branching fraction of D∗0→D0e+e- is determined to be (3.91±0.27±0.17±0.10)×10-3, where the first uncertainty is statistical, the second is systematic and the third is from external input of the branching fraction for D∗0→D0γ. © 2021 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.

Volume

104

Issue

11

URI

https://doi.org/10.1103/PhysRevD.104.112012
https://hdl.handle.net/20.500.12713/2401

Collections

  • Scopus İndeksli Yayınlar Koleksiyonu [1892]
  • WoS İndeksli Yayınlar Koleksiyonu [1965]



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