Search for the lepton number violating decay η → π + π + e − e − + c . c . via J / ψ → ϕ η

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Search for the lepton number violating decay η → π + π + e − e − + c . c . via J / ψ → ϕ η. / BESIII Collaboration ; Ачасов, Михаил Николаевич ; Мучной, Николай Юрьевич et al.

In: Physical Review D, Vol. 112, No. 11, 112021, 26.12.2025.

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

BibTeX

@article{c1472c4e31ca4e4cb17bf6d6165a7254,

title = "Search for the lepton number violating decay η → π + π + e − e − + c . c . via J / ψ → ϕ η",

abstract = " Based on a sample of ( 10.087 ± 0.044 ) × 10 9 J / ψ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violating decay η → π + π + e − e − + c . c . No signal is found, and an upper limit on the branching fraction of η → π + π + e − e − + c . c . is set to be 4.6 × 10 − 6 at the 90% confidence level. ",

keywords = "Rare decays, Baryon & lepton number symmetries",

author = "{BESIII Collaboration} and Ачасов, {Михаил Николаевич} and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "The BESIII Collaboration thanks the staff of BEPCII [53] and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts No. 2023YFA1606000, No. 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts No. 12035009, No. 11635010, No. 11935015, No. 11935016, No. 11935018, No. 12025502, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017, No. 12361141819; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS under Contract 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 under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts No. 2021.0174, No. 2021.0299; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; Swedish Research Council under Contract No. 2019.04595; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.",

year = "2025",

month = dec,

day = "26",

doi = "10.1103/3sf4-51f1",

language = "English",

volume = "112",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "11",

}

RIS

TY - JOUR

T1 - Search for the lepton number violating decay η → π + π + e − e − + c . c . via J / ψ → ϕ η

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - The BESIII Collaboration thanks the staff of BEPCII [53] and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts No. 2023YFA1606000, No. 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts No. 12035009, No. 11635010, No. 11935015, No. 11935016, No. 11935018, No. 12025502, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017, No. 12361141819; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS under Contract 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 under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts No. 2021.0174, No. 2021.0299; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; Swedish Research Council under Contract No. 2019.04595; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.

PY - 2025/12/26

Y1 - 2025/12/26

N2 - Based on a sample of ( 10.087 ± 0.044 ) × 10 9 J / ψ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violating decay η → π + π + e − e − + c . c . No signal is found, and an upper limit on the branching fraction of η → π + π + e − e − + c . c . is set to be 4.6 × 10 − 6 at the 90% confidence level.

AB - Based on a sample of ( 10.087 ± 0.044 ) × 10 9 J / ψ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violating decay η → π + π + e − e − + c . c . No signal is found, and an upper limit on the branching fraction of η → π + π + e − e − + c . c . is set to be 4.6 × 10 − 6 at the 90% confidence level.

KW - Rare decays

KW - Baryon & lepton number symmetries

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001671987600001

UR - https://www.mendeley.com/catalogue/d5c37792-6546-316b-812f-39db6860ced0/

U2 - 10.1103/3sf4-51f1

DO - 10.1103/3sf4-51f1

M3 - Article

VL - 112

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112021

ER -

ID: 80902184