Measurement of V(cb) from the decay process anti-B0 ---> D*+ lepton- anti-neutrino
Collaboration
26 pages
Published in:
- Phys.Lett.B 510 (2001) 55-74
e-Print:
- hep-ex/0104026 [hep-ex]
Report number:
- CERN-EP-2001-002
Experiments:
View in:
Citations per year
Abstract: (Elsevier)
A new precise measurement of | V cb | and of the branching ratio BR ( B ̄ 0 →D ∗+ ℓ − ν ̄ ℓ ) has been performed using a sample of about 5000 semileptonic decays B ̄ 0 →D ∗+ ℓ − ν ̄ ℓ , selected by the DELPHI detector at LEP I by tagging the soft pion from D ∗+ →D 0 π + . The results are: V cb =(39.0±1.5 (stat.) +2.5 −2.6 (syst. exp.) ±1.3 (syst. th.) )×10 −3 , BR ( B ̄ 0 →D ∗+ ℓ − ν ̄ ℓ )=(4.70±0.13 (stat.) +0.36 −0.31 (syst. exp.) )% . The analytic dependencies of the differential cross-section and of the Isgur–Wise form factor as functions of the variable w=v B 0 ·v D ∗ have also been obtained by unfolding the experimental resolution.Note:
- 26 pages, 5 figures, Accepted by Phys. Lett. B; typo corrected, reference updated Report-no: CERN-EP/2001-002
- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- bottom: pair production
- anti-B0: semileptonic decay
- anti-B0: branching ratio
- CKM matrix matrix
- form factor: decay
- Isgur-Wise function
References(31)
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