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Improved measurement of the branching fractions for J/ψ→γπ0, γη, and γη′. / The BESIII Collaboration ; Мучной, Николай Юрьевич; Николаев, Иван Борисович.
в: Physical Review D, Том 108, № 9, 092002, 02.11.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Improved measurement of the branching fractions for J/ψ→γπ0, γη, and γη′
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. n.
AU - Мучной, Николай Юрьевич
AU - Николаев, Иван Борисович
N1 - Improved measurement of the branching fractions for J/ψ→γπ0, γη, and γη′ / BESIII Collaboration // Physical Review D. – 2023. – Vol. 108, No. 9. – P. 092002. – DOI 10.1103/physrevd.108.092002.
PY - 2023/11/2
Y1 - 2023/11/2
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.elibrary.ru/item.asp?id=65443106
UR - https://www.mendeley.com/catalogue/a7dd20d8-371f-37f5-9303-3026ccd10ef6/
U2 - 10.1103/PhysRevD.108.092002
DO - 10.1103/PhysRevD.108.092002
M3 - Article
VL - 108
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 9
M1 - 092002
ER -
ID: 68350687