Direct Measurement of Ab in Z0 Decays Using Charged Kaon Tagging
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概要
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We present a direct measurement of the parity-violating asymmetry Ab in the Z0 to bb̅ coupling using a new technique to distinguish the b and b̅ quarks using charged kaons from B decays. The Z0 bosons are produced in e+e- collisions at the SLC with longitudinally polarized electrons. bb̅ events are selected using a secondary vertex mass tag and Ab is determined from the left-right forward-backward asymmetry. From the 1994–1995 data sample, selected from 100 000 hadronic Z0 decays, we obtain Ab = 0.855±0.088stat±0.102syst.
- 1999-09-06
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