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Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc. / The BESIII Collaboration ; Мучной, Николай Юрьевич; Николаев, Иван Борисович.

в: Physical Review Letters, Том 134, № 18, 09.05.2025.

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

Harvard

The BESIII Collaboration, Мучной, НЮ & Николаев, ИБ 2025, 'Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc', Physical Review Letters, Том. 134, № 18. https://doi.org/10.1103/PhysRevLett.134.181901

APA

The BESIII Collaboration, Мучной, Н. Ю., & Николаев, И. Б. (2025). Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc. Physical Review Letters, 134(18). https://doi.org/10.1103/PhysRevLett.134.181901

Vancouver

The BESIII Collaboration, Мучной НЮ, Николаев ИБ. Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc. Physical Review Letters. 2025 май 9;134(18). doi: 10.1103/PhysRevLett.134.181901

Author

The BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович. / Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc. в: Physical Review Letters. 2025 ; Том 134, № 18.

BibTeX

@article{82946e7a27494616bfa8fb50ec29bc72,
title = "Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc",
abstract = "Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the decay ηc→γγ in J/ψ→γηc is observed. We determine the product branching fraction B(J/ψ→γηc)×B(ηc→γγ)=(5.23±0.26stat±0.30syst)×10-6. This result is consistent with the lattice QCD calculation (5.34±0.16)×10-6 from HPQCD in 2023. By using the world-average values of B(J/ψ→γηc) and the total decay width of ηc, the partial decay width Γ(ηc→γγ) is determined to be (11.30±0.56stat±0.66syst±1.14ref) keV, which deviates from the corresponding world-average value by 3.4σ.",
author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and P. Adlarson and X. c. Ai and R. Aliberti and A. Amoroso and Q. An and Y. Bai and O. Bakina and Y. Ban and H.-R. Bao 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 R. a. Briere and A. Brueggemann and H. Cai and M. h. Cai and X. Cai and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",
year = "2025",
month = may,
day = "9",
doi = "10.1103/PhysRevLett.134.181901",
language = "English",
volume = "134",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",

}

RIS

TY - JOUR

T1 - Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc

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 - Briere, R. a.

AU - Brueggemann, A.

AU - Cai, H.

AU - Cai, M. h.

AU - Cai, X.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

PY - 2025/5/9

Y1 - 2025/5/9

N2 - Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the decay ηc→γγ in J/ψ→γηc is observed. We determine the product branching fraction B(J/ψ→γηc)×B(ηc→γγ)=(5.23±0.26stat±0.30syst)×10-6. This result is consistent with the lattice QCD calculation (5.34±0.16)×10-6 from HPQCD in 2023. By using the world-average values of B(J/ψ→γηc) and the total decay width of ηc, the partial decay width Γ(ηc→γγ) is determined to be (11.30±0.56stat±0.66syst±1.14ref) keV, which deviates from the corresponding world-average value by 3.4σ.

AB - Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the decay ηc→γγ in J/ψ→γηc is observed. We determine the product branching fraction B(J/ψ→γηc)×B(ηc→γγ)=(5.23±0.26stat±0.30syst)×10-6. This result is consistent with the lattice QCD calculation (5.34±0.16)×10-6 from HPQCD in 2023. By using the world-average values of B(J/ψ→γηc) and the total decay width of ηc, the partial decay width Γ(ηc→γγ) is determined to be (11.30±0.56stat±0.66syst±1.14ref) keV, which deviates from the corresponding world-average value by 3.4σ.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105005001462&origin=inward&txGid=4c235238f7ee0624a59ad2091fb85356

UR - https://www.mendeley.com/catalogue/407602f4-d8c0-39bd-91f9-d7f41ccaa66c/

U2 - 10.1103/PhysRevLett.134.181901

DO - 10.1103/PhysRevLett.134.181901

M3 - Article

VL - 134

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

ER -

ID: 66565305