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Precision measurement of the D*(0) decay branching fractions M. Ablikim, M. N. Achasov, X. C. Ai [et.al.]
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ArticleSubject(s): квантовая хромодинамика | BESIII, детектор | бозоныGenre/Form: статьи в журналах Online resources: Click here to access online
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Physical Review D Vol. 91, № 3. P. 031101(R)-1-031101(R)-8Abstract: Using 482 pb−1 of data taken at s√=4.009 GeV, we measure the branching fractions of the decays of D*0 into D0π0 and D0γ to be B(D*0→D0π0)=(65.5±0.8±0.5)% and B(D*0→D0γ)=(34.5±0.8±0.5)%, respectively, by assuming that the D*0 decays only into these two modes. The ratio of the two branching fractions is B(D*0→D0π0)/B(D*0→D0γ)=1.90±0.07±0.05, which is independent of the assumption made above. The first uncertainties are statistical and the second ones systematic. The precision is improved by a factor of 3 compared to the present world average values.
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Using 482 pb−1 of data taken at s√=4.009 GeV, we measure the branching fractions of the decays of D*0 into D0π0 and D0γ to be B(D*0→D0π0)=(65.5±0.8±0.5)% and B(D*0→D0γ)=(34.5±0.8±0.5)%, respectively, by assuming that the D*0 decays only into these two modes. The ratio of the two branching fractions is B(D*0→D0π0)/B(D*0→D0γ)=1.90±0.07±0.05, which is independent of the assumption made above. The first uncertainties are statistical and the second ones systematic. The precision is improved by a factor of 3 compared to the present world average values.
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