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Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−. / The BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.

в: Physical Review D, Том 109, № 5, 052006, 18.03.2024.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Harvard

The BESIII Collaboration, Николаев, ИБ & Мучной, НЮ 2024, 'Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−', Physical Review D, Том. 109, № 5, 052006. https://doi.org/10.1103/PhysRevD.109.052006

APA

The BESIII Collaboration, Николаев, И. Б., & Мучной, Н. Ю. (2024). Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−. Physical Review D, 109(5), [052006]. https://doi.org/10.1103/PhysRevD.109.052006

Vancouver

The BESIII Collaboration, Николаев ИБ, Мучной НЮ. Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−. Physical Review D. 2024 март 18;109(5):052006. doi: 10.1103/PhysRevD.109.052006

Author

The BESIII Collaboration ; Николаев, Иван Борисович ; Мучной, Николай Юрьевич. / Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−. в: Physical Review D. 2024 ; Том 109, № 5.

BibTeX

@article{12cb6f831711452c99b550ac1de6e5e9,
title = "Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−",
abstract = "Using a data sample of 4.481×108 ψ(3686) events collected with the BESIII detector, we report the first observation of the four-lepton-decays J/ψ→e+e-e+e- and J/ψ→e+e-μ+μ- utilizing the process ψ(3686)→π+π-J/ψ. The branching fractions are determined to be [5.48±0.31(stat)±0.45(syst)]×10-5 and [3.53±0.22(stat)±0.13(syst)]×10-5, respectively. The results are consistent with theoretical predictions. No significant signal is observed for J/ψ→μ+μ-μ+μ-, and an upper limit on the branching fraction is set at 1.6×10-6 at the 90% confidence level. A CP asymmetry observable is constructed for the first two channels, which is measured to be (-0.012±0.054±0.010) and (0.062±0.059±0.006), respectively. No evidence for CP violation is observed in this process. ",
author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Николаев, {Иван Борисович} and Мучной, {Николай Юрьевич}",
year = "2024",
month = mar,
day = "18",
doi = "10.1103/PhysRevD.109.052006",
language = "English",
volume = "109",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "5",

}

RIS

TY - JOUR

T1 - Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/3/18

Y1 - 2024/3/18

N2 - Using a data sample of 4.481×108 ψ(3686) events collected with the BESIII detector, we report the first observation of the four-lepton-decays J/ψ→e+e-e+e- and J/ψ→e+e-μ+μ- utilizing the process ψ(3686)→π+π-J/ψ. The branching fractions are determined to be [5.48±0.31(stat)±0.45(syst)]×10-5 and [3.53±0.22(stat)±0.13(syst)]×10-5, respectively. The results are consistent with theoretical predictions. No significant signal is observed for J/ψ→μ+μ-μ+μ-, and an upper limit on the branching fraction is set at 1.6×10-6 at the 90% confidence level. A CP asymmetry observable is constructed for the first two channels, which is measured to be (-0.012±0.054±0.010) and (0.062±0.059±0.006), respectively. No evidence for CP violation is observed in this process.

AB - Using a data sample of 4.481×108 ψ(3686) events collected with the BESIII detector, we report the first observation of the four-lepton-decays J/ψ→e+e-e+e- and J/ψ→e+e-μ+μ- utilizing the process ψ(3686)→π+π-J/ψ. The branching fractions are determined to be [5.48±0.31(stat)±0.45(syst)]×10-5 and [3.53±0.22(stat)±0.13(syst)]×10-5, respectively. The results are consistent with theoretical predictions. No significant signal is observed for J/ψ→μ+μ-μ+μ-, and an upper limit on the branching fraction is set at 1.6×10-6 at the 90% confidence level. A CP asymmetry observable is constructed for the first two channels, which is measured to be (-0.012±0.054±0.010) and (0.062±0.059±0.006), respectively. No evidence for CP violation is observed in this process.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85188159640&origin=inward&txGid=365b1fe8d97c6cf47698853d7a79f294

U2 - 10.1103/PhysRevD.109.052006

DO - 10.1103/PhysRevD.109.052006

M3 - Article

VL - 109

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 5

M1 - 052006

ER -

ID: 62717348