Measurement of the branching fractions of exclusive _B-->D(*)(pi)l-_nu l decays in events with a fully reconstructed B meson.
Measurement of the branching fractions of exclusive _B-->D(*)(pi)l-_nu l decays in events with a fully reconstructed B meson.
复制标题
在具有完全重建的 B 介子的事件中,排他性 _B-->D(*)(pi)l-_n l 的分支分数的测量会衰减。
DOI:
10.1103/physrevlett.100.151802
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发表时间:
2008
影响因子:
8.6
通讯作者:
Aubert B
中科院分区:
文献类型:
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作者:
Aubert B
We report a measurement of the branching fractions fordecays based onof data collected at theresonance with theBABARdetector at theSLACPEP-IIstorage rings. Events are tagged by fully reconstructing one of themesons in a hadronic decay mode. We obtain B(B-→D0ℓ-ν¯ℓ)=(2.33±0.09stat±0.09syst)%, B(B-→D*0ℓ-ν¯ℓ)=(5.83±0.15stat±0.30syst)%, B(B¯0→D+ℓ-ν¯ℓ)=(2.21±0.11stat±0.12syst)%, B(B¯0→D*+ℓ-ν¯ℓ)=(5.49±0.16stat±0.25syst)%, B(B-→D+π-ℓ-ν¯ℓ)=(0.42±0.06stat±0.03syst)%, B(B-→D*+π-ℓ-ν¯ℓ)=(0.59±0.05stat±0.04syst)%, B(B¯0→D0π+ℓ-ν¯ℓ)=(0.43±0.08stat±0.03syst)%, and B(B¯0→D*0π+ℓ-ν¯ℓ)=(0.48±0.08stat±0.04syst)%.