Standard

Search for a dark baryon in the Ξ−→π−+invisible decay. / BESIII Collaboration ; Мучной, Николай Юрьевич.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 872, 140099, 01.2026.

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

Harvard

BESIII Collaboration & Мучной, НЮ 2026, 'Search for a dark baryon in the Ξ−→π−+invisible decay', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 872, 140099. https://doi.org/10.1016/j.physletb.2025.140099

APA

BESIII Collaboration, & Мучной, Н. Ю. (2026). Search for a dark baryon in the Ξ−→π−+invisible decay. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 872, [140099]. https://doi.org/10.1016/j.physletb.2025.140099

Vancouver

BESIII Collaboration, Мучной НЮ. Search for a dark baryon in the Ξ−→π−+invisible decay. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2026 Jan;872:140099. doi: 10.1016/j.physletb.2025.140099

Author

BESIII Collaboration ; Мучной, Николай Юрьевич. / Search for a dark baryon in the Ξ−→π−+invisible decay. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2026 ; Vol. 872.

BibTeX

@article{9f6cffb0c1d147bbb2eb28b4b6851c5a,
title = "Search for a dark baryon in the Ξ−→π−+invisible decay",
abstract = "A search for a dark baryon is performed for the first time in the two-body decay Ξ−→π−+invisible using (10.087 ± 0.044) × 109 J / ψ events collected at a center-of-mass energy of s=3.097GeV with the BESIII detector at the BEPCII collider. No significant signal is observed, and the 90% (95%) confidence level upper limits on the branching fraction B(Ξ−→π−+invisible) are determined to be 4.2×10−5 (5.2×10−5), 6.9×10−5 (8.4×10−5), 6.5×10−4 (7.6×10−4), 1.1×10−4 (1.3×10−4) and 4.5×10−5 (5.5×10−5), under the dark baryon mass hypotheses of 1.07 GeV/ c 2, 1.10 GeV/ c 2, mΛ (1.116 GeV/ c 2), 1.13 GeV/ c 2, and 1.16 GeV/ c 2, respectively. The constraints obtained on the Wilson coefficients Cus,sL and Cus,sR are more stringent than the previous limits derived from the LHC searches for the colored mediators.",
keywords = "BESIII, Dark baryon, Invisible decay",
author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and P. Adlarson and Ai, {X. C.} and R. Aliberti and A. Amoroso and Q. An and Y. Bai and O. Bakina and Y. Ban and Bao, {H. R.} and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and I. Boyko and Briere, {R. A.} and A. Brueggemann and H. Cai and Cai, {M. H.} and X. Cai and A. Calcaterra and Cao, {G. F.} and N. Cao and Cetin, {S. A.} and Chai, {X. Y.} and Chang, {J. F.} and Che, {G. R.} and Che, {Y. Z.} and Chen, {C. H.} and Chao Chen and G. Chen and Chen, {H. S.} and Chen, {H. Y.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {S. L.} and Chen, {S. M.} and T. Chen and Chen, {X. R.} and Chen, {X. T.} and Chen, {X. Y.} and Chen, {Y. B.} and Chen, {Y. Q.} and Мучной, {Николай Юрьевич} and Nikolaev, {I. B.}",
note = "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, 2020YFA0406400; 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; 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; Agencia Nacional de Investigaci{\'o}n y Desarrollo de Chile (ANID), Chile under Contract No. ANID PIA/APOYO AFB230003; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. Knut and Alice Wallenberg Foundation2021.0174, 2021.0299; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. National Research Foundation of Korea 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 = "2026",
month = jan,
doi = "10.1016/j.physletb.2025.140099",
language = "English",
volume = "872",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier Science Publishing Company, Inc.",

}

RIS

TY - JOUR

T1 - Search for a dark baryon in the Ξ−→π−+invisible decay

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ai, X. C.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Ban, Y.

AU - Bao, H. R.

AU - Batozskaya, V.

AU - Begzsuren, K.

AU - Berger, N.

AU - Berlowski, M.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bianco, E.

AU - Bortone, A.

AU - Boyko, I.

AU - Briere, R. A.

AU - Brueggemann, A.

AU - Cai, H.

AU - Cai, M. H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cao, N.

AU - Cetin, S. A.

AU - Chai, X. Y.

AU - Chang, J. F.

AU - Che, G. R.

AU - Che, Y. Z.

AU - Chen, C. H.

AU - Chen, Chao

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, H. Y.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, S. L.

AU - Chen, S. M.

AU - Chen, T.

AU - Chen, X. R.

AU - Chen, X. T.

AU - Chen, X. Y.

AU - Chen, Y. B.

AU - Chen, Y. Q.

AU - Мучной, Николай Юрьевич

AU - Nikolaev, I. B.

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, 2020YFA0406400; 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; 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; Agencia Nacional de Investigación y Desarrollo de Chile (ANID), Chile under Contract No. ANID PIA/APOYO AFB230003; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. Knut and Alice Wallenberg Foundation2021.0174, 2021.0299; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. National Research Foundation of Korea 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 - 2026/1

Y1 - 2026/1

N2 - A search for a dark baryon is performed for the first time in the two-body decay Ξ−→π−+invisible using (10.087 ± 0.044) × 109 J / ψ events collected at a center-of-mass energy of s=3.097GeV with the BESIII detector at the BEPCII collider. No significant signal is observed, and the 90% (95%) confidence level upper limits on the branching fraction B(Ξ−→π−+invisible) are determined to be 4.2×10−5 (5.2×10−5), 6.9×10−5 (8.4×10−5), 6.5×10−4 (7.6×10−4), 1.1×10−4 (1.3×10−4) and 4.5×10−5 (5.5×10−5), under the dark baryon mass hypotheses of 1.07 GeV/ c 2, 1.10 GeV/ c 2, mΛ (1.116 GeV/ c 2), 1.13 GeV/ c 2, and 1.16 GeV/ c 2, respectively. The constraints obtained on the Wilson coefficients Cus,sL and Cus,sR are more stringent than the previous limits derived from the LHC searches for the colored mediators.

AB - A search for a dark baryon is performed for the first time in the two-body decay Ξ−→π−+invisible using (10.087 ± 0.044) × 109 J / ψ events collected at a center-of-mass energy of s=3.097GeV with the BESIII detector at the BEPCII collider. No significant signal is observed, and the 90% (95%) confidence level upper limits on the branching fraction B(Ξ−→π−+invisible) are determined to be 4.2×10−5 (5.2×10−5), 6.9×10−5 (8.4×10−5), 6.5×10−4 (7.6×10−4), 1.1×10−4 (1.3×10−4) and 4.5×10−5 (5.5×10−5), under the dark baryon mass hypotheses of 1.07 GeV/ c 2, 1.10 GeV/ c 2, mΛ (1.116 GeV/ c 2), 1.13 GeV/ c 2, and 1.16 GeV/ c 2, respectively. The constraints obtained on the Wilson coefficients Cus,sL and Cus,sR are more stringent than the previous limits derived from the LHC searches for the colored mediators.

KW - BESIII

KW - Dark baryon

KW - Invisible decay

UR - https://www.scopus.com/pages/publications/105026493890

UR - https://www.mendeley.com/catalogue/69f19b1d-047c-355d-827b-57e7b526dffe/

U2 - 10.1016/j.physletb.2025.140099

DO - 10.1016/j.physletb.2025.140099

M3 - Article

VL - 872

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

M1 - 140099

ER -

ID: 73870508