Measurement of vertical bar V-cb vertical bar and the Form-Factor Slope in (B)over-bar -> Dl(-) (nu)over-bar(l) Decays in Events Tagged by a Fully Reconstructed B Meson

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrixelement vertical barV-cb vertical barand the form-factor slope rho(2) in (B) overbar -> Dl(-) (nu) overbar (l) decays based on 460 X 10(6) B (B) overbar events recorded at the Gamma(4S) resonance with the BABAR detector. (B) overbar -> Dl(-) (nu) overbar (l) decays are selected in events in which a hadronic decay of the second B mesonis fully reconstructed. We measure B(B- -> D(0)l(-) (nu) overbar (l))/B(B- -> Xl(-) (nu) overbar (l)) = (0.255 +/- 0.009 +/- 0.009) and B((B) overbar (0) -> D(+)l(-) (nu) overbar (l))/B((B) overbar (0) -> Xl(-) (nu) overbar (l)) = (0.230 +/- 0.011 +/- 0.011), along with the differential decay distribution in (B) overbar -> Dl(-) (nu) overbar (l) decays. We then determine G(1) vertical barV-cb vertical bar= 42.3 +/- 1.9 +/- 1.4) X 10(-3) and rho(2) = 1.20 +/- 0.09 +/- 0.04, where G(1) is the hadronic form factor at the point of zero recoil.