Using a data sample of (1.0087 pm 0.0044Þ ) 10^10 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 pm 0.02 pm 0.09)× 10−5, B(J/ψ → γη) = (1.096 pm 0.01 pm 0.019) × 10−3, and B(J/ψ → γη') =(5.40 pm 0.01 pm 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.
Improved measurement of the branching fractions for J/ψ→γπ0, γη, and γη′
Garzia, I.;Gramigna, S.;
2023
Abstract
Using a data sample of (1.0087 pm 0.0044Þ ) 10^10 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 pm 0.02 pm 0.09)× 10−5, B(J/ψ → γη) = (1.096 pm 0.01 pm 0.019) × 10−3, and B(J/ψ → γη') =(5.40 pm 0.01 pm 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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
