First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV

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First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV. / BESIII Collaboration ; Ачасов, Михаил Николаевич ; Мучной, Николай Юрьевич et al.

In: Journal of High Energy Physics, Vol. 2026, No. 6, 101, 10.06.2026.

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

BibTeX

@article{0eb2f459bfbb4b539f6c6883fee1f755,

title = "First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV",

abstract = "Using e+e− collision data at 19 center-of-mass energies ranging from 4.396 to4.951 GeV corresponding to a total integrated luminosity of 8.86 fb−1 collected by the BESIII detector, the process e+e− → K0K−π+J/ψ + c.c. is observed for the first time, with a statistical significance of 9.4σ summing up all the data samples. Here, c.c. stands for the charge conjugated mode. For this process, the cross section and the upper limit at the 90% confidence level are reported at each of the 19 center-of-mass energies. No statistically significant vector structures are observed in the cross section line shape, nor as intermediate states of combinations of Kπ, KK¯ , KKπ¯ , KJ/ψ, πJ/ψ, and KπJ/ψ seen at individual energy points or in the combined data sample.",

keywords = "e +-e − Experiments, Exotics, Particle and Resonance Production, Quarkonium",

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

note = "The BESIII collaboration., Ablikim, M., Achasov, M.N. et al. First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV. J. High Energ. Phys. 2026, 101 (2026). https://doi.org/10.1007/JHEP06(2026)101 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 the National Key R&D Program of China under Contracts Nos. 2025YFA1613900, 2023YFA1606000, 2023YFA1606704; the National Natural Science Foundation of China (NSFC) under Contracts Nos. 12375070, 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; Joint Large Scale Scientific Facility Funds of the NSFC and CAS under Contracts Nos. U2032108; CAS under Contract No. YSBR-101; Shanghai Leading Talent Program of Eastern Talent Plan under Contract No. JLH5913002; Shanghai Top Talent Program of Eastern Talent Plan under Contract No. BJZH2025073; the 100 Talents Program of CAS; the Institute of Nuclear and Particle Physics (INPAC) and the Shanghai Key Laboratory for Particle Physics and Cosmology; the European Research Council (ERC) under Contract No. 758462; the German Research Foundation (DFG) under Contract No. FOR5327; the Istituto Nazionale di Fisica Nucleare, Italy; the Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174 and 2021.0299; the Ministry of Development of Turkey under Contract No. DPT2006K-120470; the National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; the National Science and Technology Fund of Mongolia; the Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; the Science and Technology Facilities Council (STFC, United Kingdom); the Swedish Research Council under Contract No. 2019.04595; and the U.S. Department of Energy under Contract No. DE-FG02-05ER41374.",

year = "2026",

month = jun,

day = "10",

doi = "10.1007/JHEP06(2026)101",

language = "English",

volume = "2026",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer US",

number = "6",

}

RIS

TY - JOUR

T1 - First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - The BESIII collaboration., Ablikim, M., Achasov, M.N. et al. First measurement of the cross sections for e+e− → K0K−π+J/ψ + c.c. at √s from 4.396 to 4.951 GeV. J. High Energ. Phys. 2026, 101 (2026). https://doi.org/10.1007/JHEP06(2026)101 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 the National Key R&D Program of China under Contracts Nos. 2025YFA1613900, 2023YFA1606000, 2023YFA1606704; the National Natural Science Foundation of China (NSFC) under Contracts Nos. 12375070, 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; Joint Large Scale Scientific Facility Funds of the NSFC and CAS under Contracts Nos. U2032108; CAS under Contract No. YSBR-101; Shanghai Leading Talent Program of Eastern Talent Plan under Contract No. JLH5913002; Shanghai Top Talent Program of Eastern Talent Plan under Contract No. BJZH2025073; the 100 Talents Program of CAS; the Institute of Nuclear and Particle Physics (INPAC) and the Shanghai Key Laboratory for Particle Physics and Cosmology; the European Research Council (ERC) under Contract No. 758462; the German Research Foundation (DFG) under Contract No. FOR5327; the Istituto Nazionale di Fisica Nucleare, Italy; the Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174 and 2021.0299; the Ministry of Development of Turkey under Contract No. DPT2006K-120470; the National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; the National Science and Technology Fund of Mongolia; the Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; the Science and Technology Facilities Council (STFC, United Kingdom); the Swedish Research Council under Contract No. 2019.04595; and the U.S. Department of Energy under Contract No. DE-FG02-05ER41374.

PY - 2026/6/10

Y1 - 2026/6/10

N2 - Using e+e− collision data at 19 center-of-mass energies ranging from 4.396 to4.951 GeV corresponding to a total integrated luminosity of 8.86 fb−1 collected by the BESIII detector, the process e+e− → K0K−π+J/ψ + c.c. is observed for the first time, with a statistical significance of 9.4σ summing up all the data samples. Here, c.c. stands for the charge conjugated mode. For this process, the cross section and the upper limit at the 90% confidence level are reported at each of the 19 center-of-mass energies. No statistically significant vector structures are observed in the cross section line shape, nor as intermediate states of combinations of Kπ, KK¯ , KKπ¯ , KJ/ψ, πJ/ψ, and KπJ/ψ seen at individual energy points or in the combined data sample.

AB - Using e+e− collision data at 19 center-of-mass energies ranging from 4.396 to4.951 GeV corresponding to a total integrated luminosity of 8.86 fb−1 collected by the BESIII detector, the process e+e− → K0K−π+J/ψ + c.c. is observed for the first time, with a statistical significance of 9.4σ summing up all the data samples. Here, c.c. stands for the charge conjugated mode. For this process, the cross section and the upper limit at the 90% confidence level are reported at each of the 19 center-of-mass energies. No statistically significant vector structures are observed in the cross section line shape, nor as intermediate states of combinations of Kπ, KK¯ , KKπ¯ , KJ/ψ, πJ/ψ, and KπJ/ψ seen at individual energy points or in the combined data sample.

KW - e +-e − Experiments

KW - Exotics

KW - Particle and Resonance Production

KW - Quarkonium

UR - https://www.scopus.com/pages/publications/105042340537

U2 - 10.1007/JHEP06(2026)101

DO - 10.1007/JHEP06(2026)101

M3 - Article

VL - 2026

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 6

M1 - 101

ER -

ID: 80166285