Measurement of B(anti-B0 ---> D+ l- anti-nu) and determination of |V(cb)|
Collaboration
21 pages
Published in:
- Phys.Lett.B 526 (2002) 258-268
e-Print:
- hep-ex/0111082 [hep-ex]
Report number:
- KEK-PREPRINT-2001-150,
- BELLE-PREPRINT-2001-20
Experiments:
View in:
Citations per year
Abstract: (Elsevier)
We present a measurement of the branching fraction for the semileptonic B decay B ̄ 0 →D + ℓ − ν ̄ , where ℓ − can be either an electron or a muon. We find Γ( B ̄ 0 →D + ℓ − ν ̄ )=(13.79±0.76±2.51) ns −1 , and the resulting branching fraction B ( B ̄ 0 →D + ℓ − ν ̄ )=(2.13±0.12±0.39)% , where the first error is statistical and the second systematic. We also investigate the B ̄ 0 →D + ℓ − ν ̄ form factor and the implications of the result for | V cb |. From a fit to the differential decay distribution we obtain the rate normalization | V cb | F D (1)=(4.11±0.44±0.52)×10 −2 . Using a theoretical calculation of F D (1), the Cabibbo–Kobayashi–Maskawa matrix element | V cb |=(4.19±0.45±0.53±0.30)×10 −2 is obtained, where the last error comes from the theoretical uncertainty of F D (1). The results are based on a data sample of 10.2fb −1 recorded at the ϒ (4 S ) resonance with the Belle detector at the KEKB e + e − collider.Note:
- 21pages, 5 figures, elsart.cls, to be published in PLB. In this version, the form factor comparison between B->Dlnu and D*lnu is included Report-no: Belle Prerpint 2001-20, KEK Preprint 2001-150
- 12.15.Hh
- 13.30.Ce
- 13.20.Hw
- CKM matrix
- Semileptonic
- B decay
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
References(18)
Figures(0)