A measurement of Vcb using B0 -> D*+L-vL decays
Abstract
We report a measurement of the Cabibbo-Kobayashi-Maskawa matrix element Vcb. From approximately 4.2 million hadronic Z0 decays recorded with the OPAL detector, a sample is selected containing 1251 +/- 125 B0 -> D*+L-vL candidates, where L is either an electron or a muon. Using Heavy Quark Effective Theory calculations for the decay form factor at zero recoil of the D*+ meson in the B0 rest frame, we derive Vcb = [36.0 +/- 2.1 (stat) +/- 2.4 (syst) +/- 1.2 (theory)] × 10-3.
- Publication:
-
Physics Letters B
- Pub Date:
- February 1997
- DOI:
- 10.1016/S0370-2693(97)00056-7
- Bibcode:
- 1997PhLB..395..128A