Determination of |V(cb)| using the semileptonic decay anti-B0 ---> D*+ e- anti-nu
Nov, 200120 pages
Published in:
- Phys.Lett.B 526 (2002) 247-257
e-Print:
- hep-ex/0111060 [hep-ex]
Report number:
- KEK-PREPRINT-2001-149,
- BELLE-PREPRINT-2001-19
Experiments:
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Abstract: (Elsevier)
We present a measurement of the Cabibbo–Kobayashi–Maskawa (CKM) matrix element | V cb | using a 10.2 fb −1 data sample recorded at the ϒ (4S) resonance with the Belle detector at the KEKB asymmetric e + e − storage ring. By extrapolating the differential decay width of the B ̄ 0 →D ∗+ e − ν ̄ decay to the kinematic limit at which the D ∗+ is at rest with respect to the B ̄ 0 , we extract the product of | V cb | with the normalization of the decay form factor F (1), | V cb | F (1)=(3.54±0.19±0.18)×10 −2 , where the first error is statistical and the second is systematic. A value of | V cb |=(3.88±0.21±0.20±0.19)×10 −2 is obtained using a theoretical calculation of F (1), where the third error is due to the theoretical uncertainty in the value of F (1). The branching fraction B ( B ̄ 0 →D ∗+ e − ν ̄ ) is measured to be (4.59±0.23±0.40)×10 −2 .Note:
- 20 pages, 6 figures, elsart.cls, submitted to PLB Report-no: Belle preprint 2001-19, KEK preprint 2001-149
- 12.15.Hh
- 13.30.Ce
- 13.20.Hw
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- anti-B0: semileptonic decay
- anti-B0: width
- D*(2010)
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