Improved measurement of the branching fractions for J/ψ →γπ0, γη, and γη′

BESIII Collaboration

doi:10.1103/PhysRevD.108.092002

Improved measurement of the branching fractions for J/ψ →γπ0, γη, and γη′

BESIII Collaboration

Instituto de Alta Investigación

CAS - Institute of High Energy Physics
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Uppsala University
Zhengzhou University
Chinese Academy of Sciences
Johannes Gutenberg University Mainz
University of Turin
National Institute for Nuclear Physics
Liaoning Normal University
University of Science and Technology of China
Southeast University, Nanjing
Joint Institute for Nuclear Research
Peking University
National Centre for Nuclear Research
Mongolian Academy of Sciences
Carnegie Mellon University
University of Münster
Wuhan University
University of Chinese Academy of Sciences
Istinye University
Xinyang Normal University
Nankai University
Moscow Institute of Physics and Technology
Soochow University
Nanjing University
North China Electric Power University
Tsinghua University
CAS - Institute of Modern Physics
Jilin University
Hunan University
Chung-Ang University
Ruhr University Bochum
Shandong University
Yunnan University
Helmholtz Institute Mainz
University of Jinan
Liaoning University
University of Eastern Piedmont
Sun Yat-Sen University
University of Oxford
University of Ferrara
University of Manchester
GSI Helmholtz Centre for Heavy Ion Research
Guangxi University
Henan University of Technology
Nanjing Normal University
Shandong Normal University
Fudan University
Henan Normal University
University of Hawai'i at Mānoa
Suranaree University of Technology
South China Normal University
University of the Punjab
Indiana University Bloomington
Hangzhou Normal University
Huangshan College
University of Groningen
China University of Geosciences, Wuhan
Justus Liebig University Giessen
Indian Institute of Technology Madras
Qufu Normal University
Beijing Institute of Petrochemical Technology
Lanzhou University
Sichuan University
Guangxi Normal University
Shanxi University
Central China Normal University
Henan University of Science and Technology
University of South China
Central South University
Zhejiang University
Goethe University Frankfurt
COMSATS University Islamabad
IBA
University of Perugia
Universidad de Tarapacá
Russian Research Centre Kurchatov Institute
Hunan Normal University
Shanxi Normal University
Near East University
Hebei University
University of Science and Technology Liaoning
Inner Mongolia University
Yantai University
Shanghai Jiao Tong University
Ministry of Education of the People's Republic of China
China Center of Advanced Science and Technology World Laboratory
Beihang University
Henan University

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4 Citas (Scopus)

Resumen

Using a data sample of (1.0087±0.0044)×1010 J/ψ events collected with the BESIII detector, the decays of J/ψ→γπ0(η,η′)→γγγ are studied. Newly measured branching fractions are B(J/ψ→γπ0)=(3.34±0.02±0.09)×10-5, B(J/ψ→γη)=(1.096±0.001±0.019)×10-3, and B(J/ψ→γη′)=(5.40±0.01±0.11)×10-3, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world average values within two standard deviations. The ratio of partial widths Γ(J/ψ→γη′)/Γ(J/ψ→γη) is measured to be 4.93±0.13. The singlet-octet pseudoscalar mixing angle θP is determined to be θP=-(22.11±0.26)° or -(19.34±0.34)° with two different phenomenological models.

Idioma original	Inglés
Número de artículo	092002
Publicación	Physical Review D
Volumen	108
N.º	9
DOI	https://doi.org/10.1103/PhysRevD.108.092002
Estado	Publicada - 1 nov 2023

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title = "Improved measurement of the branching fractions for J/ψ →γπ0, γη, and γη′",

abstract = "Using a data sample of (1.0087±0.0044)×1010 J/ψ events collected with the BESIII detector, the decays of J/ψ→γπ0(η,η′)→γγγ are studied. Newly measured branching fractions are B(J/ψ→γπ0)=(3.34±0.02±0.09)×10-5, B(J/ψ→γη)=(1.096±0.001±0.019)×10-3, and B(J/ψ→γη′)=(5.40±0.01±0.11)×10-3, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world average values within two standard deviations. The ratio of partial widths Γ(J/ψ→γη′)/Γ(J/ψ→γη) is measured to be 4.93±0.13. The singlet-octet pseudoscalar mixing angle θP is determined to be θP=-(22.11±0.26)° or -(19.34±0.34)° with two different phenomenological models.",

author = "M. Ablikim and Achasov, \{M. N.\} and P. Adlarson and Ai, \{X. C.\} and S. Kabana and \{The BESIII collaboration\}",

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T1 - Improved measurement of the branching fractions for J/ψ →γπ0, γη, and γη′

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ai, X. C.

AU - Kabana, S.

AU - The BESIII collaboration

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2023/11/1

Y1 - 2023/11/1

N2 - Using a data sample of (1.0087±0.0044)×1010 J/ψ events collected with the BESIII detector, the decays of J/ψ→γπ0(η,η′)→γγγ are studied. Newly measured branching fractions are B(J/ψ→γπ0)=(3.34±0.02±0.09)×10-5, B(J/ψ→γη)=(1.096±0.001±0.019)×10-3, and B(J/ψ→γη′)=(5.40±0.01±0.11)×10-3, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world average values within two standard deviations. The ratio of partial widths Γ(J/ψ→γη′)/Γ(J/ψ→γη) is measured to be 4.93±0.13. The singlet-octet pseudoscalar mixing angle θP is determined to be θP=-(22.11±0.26)° or -(19.34±0.34)° with two different phenomenological models.

AB - Using a data sample of (1.0087±0.0044)×1010 J/ψ events collected with the BESIII detector, the decays of J/ψ→γπ0(η,η′)→γγγ are studied. Newly measured branching fractions are B(J/ψ→γπ0)=(3.34±0.02±0.09)×10-5, B(J/ψ→γη)=(1.096±0.001±0.019)×10-3, and B(J/ψ→γη′)=(5.40±0.01±0.11)×10-3, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world average values within two standard deviations. The ratio of partial widths Γ(J/ψ→γη′)/Γ(J/ψ→γη) is measured to be 4.93±0.13. The singlet-octet pseudoscalar mixing angle θP is determined to be θP=-(22.11±0.26)° or -(19.34±0.34)° with two different phenomenological models.

UR - https://www.scopus.com/pages/publications/85180970742

U2 - 10.1103/PhysRevD.108.092002

DO - 10.1103/PhysRevD.108.092002

M3 - Article

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SN - 2470-0010

VL - 108

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 092002

ER -

Improved measurement of the branching fractions for J/ψ →γπ0, γη, and γη′

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