Research output: Contribution to journal › Article › peer-review
Search for the charmonium semi-leptonic weak decay J/ψ→Ds−e+νe+c.c. / BESIII Collaboration ; Ачасов, Михаил Николаевич; Мучной, Николай Юрьевич et al.
In: Journal of High Energy Physics, Vol. 2026, No. 7, 194, 22.07.2026.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Search for the charmonium semi-leptonic weak decay J/ψ→Ds−e+νe+c.c.
AU - BESIII Collaboration
AU - Ачасов, Михаил Николаевич
AU - Мучной, Николай Юрьевич
AU - Николаев, Иван Борисович
N1 - The BESIII Collaboration thanks the staff of BEPCII (https://cstr.cn/31109.02.BEPC) 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 Nos. 2023YFA1606000, 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts 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; the Strategic Priority Research Program of Chinese Academy of Sciences under Contract No. XDA0480600; 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; ERC under Contract No. 758462; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174, 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; STFC (United Kingdom); Swedish Research Council under Contract No. 2019.04595; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.
PY - 2026/7/22
Y1 - 2026/7/22
N2 - Using a data sample of (10087 ± 44) × 106 J/ψ events collected with the BESIIIdetector at a center-of-mass energy of √s = 3.097 GeV, a dedicated search for the charmonium semileptonic weak decay J/ψ → D−se+νe +c.c. is performed. No significant signal is observed. An upper limit on the branching fraction is set at B(J/ψ → D−se+νe + c.c.) < 9.9 × 10−8 at the 90% confidence level. This result improves upon previous constraints by an order of magnitude, representing the most stringent experimental limit to date. It thus provides a critical test of Standard Model predictions and new physics scenarios in heavy-quark dynamics.
AB - Using a data sample of (10087 ± 44) × 106 J/ψ events collected with the BESIIIdetector at a center-of-mass energy of √s = 3.097 GeV, a dedicated search for the charmonium semileptonic weak decay J/ψ → D−se+νe +c.c. is performed. No significant signal is observed. An upper limit on the branching fraction is set at B(J/ψ → D−se+νe + c.c.) < 9.9 × 10−8 at the 90% confidence level. This result improves upon previous constraints by an order of magnitude, representing the most stringent experimental limit to date. It thus provides a critical test of Standard Model predictions and new physics scenarios in heavy-quark dynamics.
KW - Branching fraction
KW - Quarkonium
KW - e +-e − Experiments
KW - Rare Decay
UR - https://www.scopus.com/pages/publications/105047502407
U2 - 10.1007/JHEP07(2026)194
DO - 10.1007/JHEP07(2026)194
M3 - Article
VL - 2026
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1029-8479
IS - 7
M1 - 194
ER -
ID: 83281272