Direct Measurement of Ab in Z0 decays using charged kaon tagging

Direct Measurement of Ab in Z0 decays using charged kaon tagging

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We present a direct measurement of the_parity-violating asymmetry Ab, in the Z0 to bb̄ coupling using a new technique to distinguish the b and b̄ quarks using charged kaons from B decays. The Z0 bosons are produced in e+e- collisions at the SLC with longitudinally polarized electrons, bb̄ events are...

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Bibliographic Details
Main Authors: Abe, K, Abe, T, Adam, I, Akagi, T, Allen, N, Arodzero, A, Ash, W, Aston, D, Baird, K, Baltay, C, Band, H, Barakat, M, Bardon, O, Barklow, T, Bashindzhagyan, G, Bauer, J, Bellodi, G, Ben-David, R, Benvenuti, A, Bilei, G, Bisello, D, Blaylock, G, Bogart, JR, Bolen, B, Bower, G
Format: Journal article
Language:English
Published: 1999
Description
Summary:We present a direct measurement of the_parity-violating asymmetry Ab, in the Z0 to bb̄ coupling using a new technique to distinguish the b and b̄ quarks using charged kaons from B decays. The Z0 bosons are produced in e+e- collisions at the SLC with longitudinally polarized electrons, bb̄ 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 100000 hadronic Z0 decays, we obtain Ab = 0.855 ± 0.088stal ± 0.102syst. © 1999 The American Physical Society.

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