Journal article
Measurement of B(B̄0→D ℓ−ν̄) and determination of |Vcb|
Belle Collaboration, K Abe, K Abe, R Abe, T Abe, I Adachi, Byoung Sup Ahn, H Aihara, M Akatsu, Y Asano, T Aso, V Aulchenko, T Aushev, AM Bakich, Y Ban, E Banas, S Behari, PK Behera, A Bondar, A Bozek Show all
Physics Letters B | Elsevier | Published : 2002
Abstract
We present a measurement of the branching fraction for the semileptonic B decay B̄0→D+ℓ−ν̄, where ℓ− can be either an electron or a muon. We find Γ(B̄0→D+ℓ−ν̄)=(13.79±0.76±2.51) ns−1, and the resulting branching fraction B(B̄0→D+ℓ−ν̄)=(2.13±0.12±0.39)%, where the first error is statistical and the second systematic. We also investigate the B̄0→D+ℓ−ν̄ form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|FD(1)=(4.11±0.44±0.52)×10−2. Using a theoretical calculation of FD(1), the Cabibbo–Kobayashi–Maskawa matrix element |Vcb|=(4.19±0.45±0.53±0.30)×10−2 is obtained, where the last error comes from the the..
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