Measurement of the Double-inclusive bb Quark Fragmentation Function in Z0 decays and First Measurement of Angle

We present preliminary results of a measurement of the double-inclusive bb ̄ quark frag-mentation function in Z0 decays using a novel kinematic B hadron energy reconstruction technique. The measurement is performed using 350,000 hadronic Z0 events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector are used to reconstruct topological B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measure the B energy with good efficiency and resolution over the full kinematic range. We present a preliminary mea-surement of the angle dependent correlations between the B and B ̄ hadron energies in Z0 → bb ̄ events, and compare with the leading order QCD predictions