Symmetry Tests in Polarized Z0 Decays to bbg
Abstract
Angular asymmetries have been measured in polarized Z0 decays to bbg collected by the SLD experiment at the SLC. A high purity bbg 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 b- and bbar-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 Z0 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 b- and bbar-jet. We measure the expectation values of these quantities to be consistent with zero and set limits on the correlations at the 5% level.
- Publication:
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arXiv e-prints
- Pub Date:
- August 1999
- DOI:
- 10.48550/arXiv.hep-ex/9908031
- arXiv:
- arXiv:hep-ex/9908031
- Bibcode:
- 1999hep.ex....8031S
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 20 pages, 5 figures