Decays to B ¯ Bg * the Sld Collaboration

Angular asymmetries have been measured in polarized Z 0 decays to b ¯ bg collected by the SLD experiment at the SLC. A high purity b ¯ bg event sample is selected by utilizing B lifetime information given by the SLD CCD pixel vertex detector and the stable micron-size SLC beams, and the band ¯ b-jets are identified using lifetime information and momentum-weighted track charge. The forward-backward asymmetry is observed in the b-quark polar angle distribution, and the parity-violation parameter is measured to test the Standard Model. Two angular correlations between the three-jet plane and the Z 0 polarization are studied. The CP-even and T-odd, and the CP-odd and T-odd, angular asymmetries are sensitive to physics beyond the Standard Model. The latter requires tagging both the band ¯ b-jet. We measure the expectation values of these quantities to be consistent with zero and set limits on the correlations at the 5% level.