Research output: Contribution to journal › Article › peer-review
Measurement of the branching fraction of the decay J/ψ→pp¯η. / BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.
In: Physical Review D, Vol. 110, No. 7, 099902, 29.10.2024.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Measurement of the branching fraction of the decay J/ψ→pp¯η
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. n.
AU - Николаев, Иван Борисович
AU - Мучной, Николай Юрьевич
PY - 2024/10/29
Y1 - 2024/10/29
N2 - A high-precision measurement of the branching fraction of the decay J/ψ→pp¯η is performed using (10 087±44)×106 J/ψ events recorded by the BESIII detector at the BEPCII storage ring. The branching fractions of the two decays J/ψ→pp¯η(η→γγ) and J/ψ→pp¯η(η→π+π-π0) are measured individually to be B(J/ψ→pp¯η(η→γγ))=(1.480±0.001±0.024)×10-3 and B(J/ψ→pp¯η(η→π+π-π0))=(1.557±0.003±0.038)×10-3, where the first uncertainties are statistical and the second systematic. Both results are compatible within their uncorrelated systematic uncertainties. The combined result is B(J/ψ→pp¯η)=(1.495±0.001±0.023)×10-3, where the first uncertainty is the combined statistical uncertainty and the second one the combined systematic uncertainty of both analyses, incorporating correlations between them. In addition, the pp¯ threshold region is investigated for a potential threshold enhancement, and no evidence for one is observed.
AB - A high-precision measurement of the branching fraction of the decay J/ψ→pp¯η is performed using (10 087±44)×106 J/ψ events recorded by the BESIII detector at the BEPCII storage ring. The branching fractions of the two decays J/ψ→pp¯η(η→γγ) and J/ψ→pp¯η(η→π+π-π0) are measured individually to be B(J/ψ→pp¯η(η→γγ))=(1.480±0.001±0.024)×10-3 and B(J/ψ→pp¯η(η→π+π-π0))=(1.557±0.003±0.038)×10-3, where the first uncertainties are statistical and the second systematic. Both results are compatible within their uncorrelated systematic uncertainties. The combined result is B(J/ψ→pp¯η)=(1.495±0.001±0.023)×10-3, where the first uncertainty is the combined statistical uncertainty and the second one the combined systematic uncertainty of both analyses, incorporating correlations between them. In addition, the pp¯ threshold region is investigated for a potential threshold enhancement, and no evidence for one is observed.
UR - https://www.mendeley.com/catalogue/9e42106d-92a7-39f8-b990-1e92c015fb3c/
U2 - 10.1103/PhysRevD.110.072021
DO - 10.1103/PhysRevD.110.072021
M3 - Article
VL - 110
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 7
M1 - 099902
ER -
ID: 67755313