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

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Improved measurement of the branching fractions for J/ψ→γπ0, γη, and γη′. / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 108, No. 9, 092002, 02.11.2023.

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

BibTeX

@article{1cd7ccafe2dc48b28ed5c793e20289b0,

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 = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "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.",

year = "2023",

month = nov,

day = "2",

doi = "10.1103/PhysRevD.108.092002",

language = "English",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

}

RIS

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