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Measurement of the branching fractions of χcJ→ π+π−π0π0 via ψ(3686) → γχcJ. / The BESIII Collaboration ; Ачасов, Михаил Николаевич; Мучной, Николай Юрьевич и др.
в: Journal of High Energy Physics, Том 2026, № 8, 23, 05.08.2026.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Measurement of the branching fractions of χcJ→ π+π−π0π0 via ψ(3686) → γχcJ
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. 2025YFA1613900, 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, 12342502, 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, 2023.0315; 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 - 2026/8/5
Y1 - 2026/8/5
N2 - Using (2712.4 ± 14.3) × 106 ψ(3686) events collected with the BESIII detector operating at BEPCII, the branching fractions of χcJ → π+π−π0π0 (J = 0, 1, 2) are measured via the radiative transition ψ(3686) → γχcJ. The results are ℬ(χc0 → π+π−π0π0) = (3.10 ± 0.01 ± 0.14) × 10−2, ℬ(χc1 → π+π−π0π0) = (1.16 ± 0.01 ± 0.05) × 10−2, and B(χc2 → π+π−π0π0) = (1.92 ± 0.01 ± 0.08) × 10−2, where the first uncertainties are statistical and the second systematic. The dominant intermediate states are found to be χcJ → ρ+ρ−. These results improve upon previous measurements with significantly enhanced precision.
AB - Using (2712.4 ± 14.3) × 106 ψ(3686) events collected with the BESIII detector operating at BEPCII, the branching fractions of χcJ → π+π−π0π0 (J = 0, 1, 2) are measured via the radiative transition ψ(3686) → γχcJ. The results are ℬ(χc0 → π+π−π0π0) = (3.10 ± 0.01 ± 0.14) × 10−2, ℬ(χc1 → π+π−π0π0) = (1.16 ± 0.01 ± 0.05) × 10−2, and B(χc2 → π+π−π0π0) = (1.92 ± 0.01 ± 0.08) × 10−2, where the first uncertainties are statistical and the second systematic. The dominant intermediate states are found to be χcJ → ρ+ρ−. These results improve upon previous measurements with significantly enhanced precision.
KW - Branching fraction
KW - Charm Physics
KW - e +-e − Experiments
UR - https://www.scopus.com/pages/publications/105049210618
U2 - 10.1007/JHEP08(2026)023
DO - 10.1007/JHEP08(2026)023
M3 - Article
VL - 2026
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1029-8479
IS - 8
M1 - 23
ER -
ID: 83280689