Measurements of the absolute branching fractions of the Λ+c hadronic decays

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Measurements of the absolute branching fractions of the Λ+c hadronic decays. / The BESIII Collaboration ; Ачасов, Михаил Николаевич ; Мучной, Николай Юрьевич и др.

в: Journal of High Energy Physics, Том 2026, № 6, 269, 26.06.2026.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{d8fa817ef8264e3d920cb329e891bcb7,

title = "Measurements of the absolute branching fractions of the Λ+c hadronic decays",

abstract = "Based on 4.5 fb−1 of e+e− collision data collected at center-of-mass energiesbetween 4599.53 MeV and 4698.82 MeV with the BESIII detector, the absolute branching fractions of twelve Λ+c hadronic decay modes are measured with a double-tag technique. A global least-square fit is implemented simultaneously among different decay modes at different energy points. This paper gives the most precise results on the branching fractions of different decay modes to date, with precision improved by a factor of 2 to 3. Among them, the branching fraction of Λ+c → pK−π+ is determined to be (6.61 ± 0.11 ± 0.12)%, where thefirst uncertainty is statistical and the second is systematic. In addition, the e+e− → Λ+c Λ¯−c Born cross sections and the effective form factors (|Geff|) at different energy points have been determined with the highest precision to date.",

keywords = "e +-e − Experiments, Charm Physics",

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. Measurements of the absolute branching fractions of the Λ+c hadronic decays. J. High Energ. Phys. 2026, 269 (2026). https://doi.org/10.1007/JHEP06(2026)269 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, 12422504, 12365015, 124B2097; 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; Fundamental Research Funds for the Central Universities, Lanzhou University under Contracts Nos. lzujbky-2025-ytB01, lzujbky-2023-stlt01, University of Chinese Academy of Sciences; The Natural Science Foundation of Inner Mongolia Autonomous Region No. 2023QN01011; 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.",

year = "2026",

month = jun,

day = "26",

doi = "10.1007/JHEP06(2026)269",

language = "English",

volume = "2026",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer US",

number = "6",

}

RIS

TY - JOUR

T1 - Measurements of the absolute branching fractions of the Λ+c hadronic decays

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. Measurements of the absolute branching fractions of the Λ+c hadronic decays. J. High Energ. Phys. 2026, 269 (2026). https://doi.org/10.1007/JHEP06(2026)269 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, 12422504, 12365015, 124B2097; 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; Fundamental Research Funds for the Central Universities, Lanzhou University under Contracts Nos. lzujbky-2025-ytB01, lzujbky-2023-stlt01, University of Chinese Academy of Sciences; The Natural Science Foundation of Inner Mongolia Autonomous Region No. 2023QN01011; 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 - 2026/6/26

Y1 - 2026/6/26

N2 - Based on 4.5 fb−1 of e+e− collision data collected at center-of-mass energiesbetween 4599.53 MeV and 4698.82 MeV with the BESIII detector, the absolute branching fractions of twelve Λ+c hadronic decay modes are measured with a double-tag technique. A global least-square fit is implemented simultaneously among different decay modes at different energy points. This paper gives the most precise results on the branching fractions of different decay modes to date, with precision improved by a factor of 2 to 3. Among them, the branching fraction of Λ+c → pK−π+ is determined to be (6.61 ± 0.11 ± 0.12)%, where thefirst uncertainty is statistical and the second is systematic. In addition, the e+e− → Λ+c Λ¯−c Born cross sections and the effective form factors (|Geff|) at different energy points have been determined with the highest precision to date.

AB - Based on 4.5 fb−1 of e+e− collision data collected at center-of-mass energiesbetween 4599.53 MeV and 4698.82 MeV with the BESIII detector, the absolute branching fractions of twelve Λ+c hadronic decay modes are measured with a double-tag technique. A global least-square fit is implemented simultaneously among different decay modes at different energy points. This paper gives the most precise results on the branching fractions of different decay modes to date, with precision improved by a factor of 2 to 3. Among them, the branching fraction of Λ+c → pK−π+ is determined to be (6.61 ± 0.11 ± 0.12)%, where thefirst uncertainty is statistical and the second is systematic. In addition, the e+e− → Λ+c Λ¯−c Born cross sections and the effective form factors (|Geff|) at different energy points have been determined with the highest precision to date.

KW - e +-e − Experiments

KW - Charm Physics

UR - https://www.scopus.com/pages/publications/105043436088

U2 - 10.1007/JHEP06(2026)269

DO - 10.1007/JHEP06(2026)269

M3 - Article

VL - 2026

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 6

M1 - 269

ER -

ID: 80166901