Reconstruction of B- → D*0e- anti νe decays and determination of vertical stroke Vcb vertical stroke

In this analysis the decay B- → D*0e- anti νe is measured. The underlying data sample consists of about 226 million B anti B-pairs accumulated on the Υ(4S) resonance by the BABAR detector at the asymmetric e+e- collider PEP-II. The reconstruction of the decay uses the channels D*0 → D0π0, D0 → K-π+ and π0 → γγ. The neutrino is not reconstructed. Since the rest frame of the B meson is unknown, the boost w of the D*0 meson in the B meson rest frame is estimated by w. The w spectrum of the data is described in terms of the partial decay width dΓ/dw given by theory and the detector simulation translating each spectrum dΓ/dw into an expectation of the measured w spectrum. dΓ/dw depends on a form factor F(w) parameterizing the strong interaction in the decay process. To find the best descriptive dΓ/dw a fit to the data determines the following two parameters of dΓ/dw: (i) F(1) vertical stroke Vcb vertical stroke, the product between F at zero D*0-recoil and the CKM matrix element vertical stroke Vcb vertical stroke; (ii) ρ2A1, a parameter of the form factor F(w). The former parameter scales the height of dΓ/dw and ρ2A1 varies the shape of it. The determined values of F(1) vertical stroke Vcb vertical stroke, ρ2A1 and B(B- → D*0e- anti νe) are F(1) vertical stroke Vcb vertical stroke =(35.8±0.5±1.5) x 10-3, ρ2A1=(1.08±0.05±0.09) and B(B- → D*0e- anti νe)=(5.60±0.08±0.42)%, where the uncertainties are statistical and systematic, respectively. The values of B(B- → D*0e- anti νe) has been determined by an integration of dΓ/dw over the allowed w range using the fitted values of F(1) vertical stroke Vcb vertical stroke and ρ2A1. (orig.)