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

In: Physical Review Letters, Vol. 134, No. 18, 181901, 09.05.2025.

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

Harvard

BESIII Collaboration, Мучной, НЮ & Николаев, ИБ 2025, 'Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc', Physical Review Letters, vol. 134, no. 18, 181901. https://doi.org/10.1103/PhysRevLett.134.181901

APA

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), [181901]. https://doi.org/10.1103/PhysRevLett.134.181901

Vancouver

BESIII Collaboration, Мучной НЮ, Николаев ИБ. Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc. Physical Review Letters. 2025 May 9;134(18):181901. doi: 10.1103/PhysRevLett.134.181901

Author

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

BibTeX

@article{82946e7a27494616bfa8fb50ec29bc72,
title = "Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc",
abstract = "Using (2712.4±14.3)×106  휓⁡(3686) events collected with the BESIII detector at the BEPCII collider, the decay 휂푐→훾⁢훾 in 퐽/휓→훾⁢휂푐 is observed. We determine the product branching fraction ℬ⁡(퐽/휓→훾⁢휂푐)×ℬ⁡(휂푐→훾⁢훾)=(5.23±0.2⁢6stat±0.3⁢0syst)×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⁡(퐽/휓→훾⁢휂푐) and the total decay width of 휂푐, the partial decay width Γ⁡(휂푐 →훾⁢훾) is determined to be (11.30±0.5⁢6stat±0.6⁢6syst±1.1⁢4ref)  keV, which deviates from the corresponding world-average value by 3.4⁢휎.",
author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",
note = "Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc / The BESIII Collaboration // Physical Review Letters. – 2025. – Vol. 134, No. 18. – P. 181901. – DOI 10.1103/physrevlett.134.181901.",
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 - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc / The BESIII Collaboration // Physical Review Letters. – 2025. – Vol. 134, No. 18. – P. 181901. – DOI 10.1103/physrevlett.134.181901.

PY - 2025/5/9

Y1 - 2025/5/9

N2 - Using (2712.4±14.3)×106  휓⁡(3686) events collected with the BESIII detector at the BEPCII collider, the decay 휂푐→훾⁢훾 in 퐽/휓→훾⁢휂푐 is observed. We determine the product branching fraction ℬ⁡(퐽/휓→훾⁢휂푐)×ℬ⁡(휂푐→훾⁢훾)=(5.23±0.2⁢6stat±0.3⁢0syst)×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⁡(퐽/휓→훾⁢휂푐) and the total decay width of 휂푐, the partial decay width Γ⁡(휂푐 →훾⁢훾) is determined to be (11.30±0.5⁢6stat±0.6⁢6syst±1.1⁢4ref)  keV, which deviates from the corresponding world-average value by 3.4⁢휎.

AB - Using (2712.4±14.3)×106  휓⁡(3686) events collected with the BESIII detector at the BEPCII collider, the decay 휂푐→훾⁢훾 in 퐽/휓→훾⁢휂푐 is observed. We determine the product branching fraction ℬ⁡(퐽/휓→훾⁢휂푐)×ℬ⁡(휂푐→훾⁢훾)=(5.23±0.2⁢6stat±0.3⁢0syst)×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⁡(퐽/휓→훾⁢휂푐) and the total decay width of 휂푐, the partial decay width Γ⁡(휂푐 →훾⁢훾) is determined to be (11.30±0.5⁢6stat±0.6⁢6syst±1.1⁢4ref)  keV, which deviates from the corresponding world-average value by 3.4⁢휎.

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/

UR - https://pubmed.ncbi.nlm.nih.gov/40408683/

U2 - 10.1103/PhysRevLett.134.181901

DO - 10.1103/PhysRevLett.134.181901

M3 - Article

C2 - 40408683

VL - 134

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

M1 - 181901

ER -

ID: 66565305