편극된 Z^0의 bb￣g로의 붕괴를 이용한 대칭성 검증 = Symmetry Tests in Polarized Z^0 Decays to bb￣g

다국어 초록 (Multilingual Abstract)

Angular asymmetries have been measured in polarized Z0 decays to b□g collected by the SLD experiment at the SLC. A high purity b□g event sample is selected utilizing B lifetime information given by the SLD CCD pixel vertex detector and the stable micron-size SLC beams, and the b- and □-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. We measure the expectation values of these quantities to be consistent with zero and set limits on the correlations at the 5% level.

목차 (Table of Contents)

• Ⅰ.Introduction
• Ⅱ.Angular asymmetries in Z0→q□g
• Ⅲ.Event and Track Selection
• Ⅳ.b□g Analysis
• Ⅴ.Monte Carlo Simulation
• Ⅵ.Angular Asymmetries
• Ⅶ.Systematic Errors
• Ⅷ.Conclusions