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Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓. / BESIII Collaboration ; Ачасов, Михаил Николаевич; Мучной, Николай Юрьевич et al.

In: Science China: Physics, Mechanics and Astronomy, Vol. 69, No. 5, 251012, 30.03.2026.

Research output: Contribution to journal › Article › peer-review

Harvard

BESIII Collaboration, Ачасов, МН, Мучной, НЮ & Николаев, ИБ 2026, 'Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓', Science China: Physics, Mechanics and Astronomy, vol. 69, no. 5, 251012. https://doi.org/10.1007/s11433-025-2901-7

APA

BESIII Collaboration, Ачасов, М. Н., Мучной, Н. Ю., & Николаев, И. Б. (2026). Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓. Science China: Physics, Mechanics and Astronomy, 69(5), [251012]. https://doi.org/10.1007/s11433-025-2901-7

Vancouver

BESIII Collaboration, Ачасов МН, Мучной НЮ, Николаев ИБ. Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓. Science China: Physics, Mechanics and Astronomy. 2026 Mar 30;69(5):251012. doi: 10.1007/s11433-025-2901-7

Author

BESIII Collaboration ; Ачасов, Михаил Николаевич ; Мучной, Николай Юрьевич et al. / Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓. In: Science China: Physics, Mechanics and Astronomy. 2026 ; Vol. 69, No. 5.

BibTeX

@article{193d0c4cdf7f4c57940e9941f9da6663,
title = "Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓",
abstract = "By analyzing (2367.0±11.1)×106 ψ(3686) events collected in e+e− collisions at √s = 3.686 GeV with the BESIII detector at the BEPCII collider, we report the first search for the charged lepton flavor violating decay ψ(3686) → e±µ∓. No signal is observed. An upper limit on the branching fraction B(ψ(3686) → e±µ∓) is determined to be 1.4 × 10−8 at the 90% confidence level.",
keywords = "e +-e − Experiments, charmonium, lepton flavor violating decay, BESIII",
author = "{BESIII Collaboration} and Ачасов, {Михаил Николаевич} and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",
note = "BESIII Collaboration., Ablikim, M., Achasov, M.N. et al. Search for the charged lepton flavor violating decay ψ(3686)→e±μ∓. Sci. China Phys. Mech. Astron. 69, 251012 (2026). https://doi.org/10.1007/s11433-025-2901-7 This work was supported by the National Key R&D Program of China (Grant Nos. 2023YFA1606000, 2023YFA1606704), the National Natural Science Foundation of China (NSFC) (Grant Nos. 11635010, 11935015, 11935016, 11935018, 12025502, 12035009, 12035013, 12061131003, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12221005, 12225509, 12235017, 12361141819), the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program (Grant No. YSBR-101), 100 Talents Program of CAS, the Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology, German Research Foundation DFG (Grant No. FOR5327), Istituto Nazionale di Fisica Nucleare, Italy, Knut and Alice Wallenberg Foundation (Grant Nos. 2021.0174, 2021.0299), Ministry of Development of T{\"u}rkiye (Grant No. DPT2006K-120470), National Research Foundation of Korea (Grant No. NRF-2022R1A2C1092335), National Science and Technology Fund of Mongolia, National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand (Grant No. B50G670107), Polish National Science Centre (Grant No. 2024/53/B/ST2/00975), Swedish Research Council (Grant No. 2019.04595), and U.S. Department of Energy (Grant No. DE-FG02-05ER41374). The BESIII Collaboration thanks the staff of BEPCII (https://cstr.cn/31109.02.BEPC) and the IHEP computing center for their strong support.",
year = "2026",
month = mar,
day = "30",
doi = "10.1007/s11433-025-2901-7",
language = "English",
volume = "69",
journal = "Science China: Physics, Mechanics and Astronomy",
issn = "1674-7348",
publisher = "Science Press (China)",
number = "5",

}

RIS

TY - JOUR

T1 - Search for the charged lepton flavor violating decay ψ(3686)→e±µ∓

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - BESIII Collaboration., Ablikim, M., Achasov, M.N. et al. Search for the charged lepton flavor violating decay ψ(3686)→e±μ∓. Sci. China Phys. Mech. Astron. 69, 251012 (2026). https://doi.org/10.1007/s11433-025-2901-7 This work was supported by the National Key R&D Program of China (Grant Nos. 2023YFA1606000, 2023YFA1606704), the National Natural Science Foundation of China (NSFC) (Grant Nos. 11635010, 11935015, 11935016, 11935018, 12025502, 12035009, 12035013, 12061131003, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12221005, 12225509, 12235017, 12361141819), the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program (Grant No. YSBR-101), 100 Talents Program of CAS, the Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology, German Research Foundation DFG (Grant No. FOR5327), Istituto Nazionale di Fisica Nucleare, Italy, Knut and Alice Wallenberg Foundation (Grant Nos. 2021.0174, 2021.0299), Ministry of Development of Türkiye (Grant No. DPT2006K-120470), National Research Foundation of Korea (Grant No. NRF-2022R1A2C1092335), National Science and Technology Fund of Mongolia, National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand (Grant No. B50G670107), Polish National Science Centre (Grant No. 2024/53/B/ST2/00975), Swedish Research Council (Grant No. 2019.04595), and U.S. Department of Energy (Grant No. DE-FG02-05ER41374). The BESIII Collaboration thanks the staff of BEPCII (https://cstr.cn/31109.02.BEPC) and the IHEP computing center for their strong support.

PY - 2026/3/30

Y1 - 2026/3/30

N2 - By analyzing (2367.0±11.1)×106 ψ(3686) events collected in e+e− collisions at √s = 3.686 GeV with the BESIII detector at the BEPCII collider, we report the first search for the charged lepton flavor violating decay ψ(3686) → e±µ∓. No signal is observed. An upper limit on the branching fraction B(ψ(3686) → e±µ∓) is determined to be 1.4 × 10−8 at the 90% confidence level.

AB - By analyzing (2367.0±11.1)×106 ψ(3686) events collected in e+e− collisions at √s = 3.686 GeV with the BESIII detector at the BEPCII collider, we report the first search for the charged lepton flavor violating decay ψ(3686) → e±µ∓. No signal is observed. An upper limit on the branching fraction B(ψ(3686) → e±µ∓) is determined to be 1.4 × 10−8 at the 90% confidence level.

KW - e +-e − Experiments

KW - charmonium

KW - lepton flavor violating decay

KW - BESIII

UR - https://www.scopus.com/pages/publications/105038084868

U2 - 10.1007/s11433-025-2901-7

DO - 10.1007/s11433-025-2901-7

M3 - Article

VL - 69

JO - Science China: Physics, Mechanics and Astronomy

JF - Science China: Physics, Mechanics and Astronomy

SN - 1674-7348

IS - 5

M1 - 251012

ER -

ID: 80207873