- Abstract:
-
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| based on a sample of about 53 700 B̄0 → D*+ℓ-ν̄ℓ decays observed by the BABAR detector. We obtain the branching fraction averaged over ℓ = e, μ, B(B̄0 → D*+ℓ -ν̄ℓ) = (4.90 ± 0.07(stat.) -0.35+0.36(syst.))%. We measure the differential decay rate as a function of w, the relativistic boost γ of the D*+ in the B̄0 rest frame. By extrapolating dΓ/dw to the kinematic limit w → 1, we extract the product of |V cb| and the...
Expand abstract - Publisher copy:
- 10.1103/PhysRevD.71.051502
-
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- Journal:
- Physical Review D - Particles, Fields, Gravitation and Cosmology
- Volume:
- 71
- Issue:
- 5
- Pages:
- 1-8
- Publication date:
- 2005-03-01
- DOI:
- ISSN:
-
1550-7998
- URN:
-
uuid:fe6fb8e2-42c5-49fa-97b4-07d7e417e399
- Source identifiers:
-
315156
- Local pid:
- pubs:315156
- Language:
- English
- Copyright date:
- 2005
Journal article
Measurement of the B̄0 → D *+ℓ-ν̄ℓ decay rate and |Vcb|
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