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SLAC-PUB-7886
Measurement of A_b Resonance using a Jet-Charge Technique

Abstract

We present a new preliminary measurement of the parity-violation parameter A_b using a self-calibrating jet-charge technique. In the SLD experiment we observe hadronic decays of Z⁰ bosons produced in collisions between longitudinally polarized electrons and unpolarized positrons at the SLAC Linear Collider. A sample of b anti-b events is selected using the topologically reconstructed mass of B hadrons. From our 1997-1998 data sample of approximately 200,000 hadronic Z⁰ decays, we obtain A_b=0.824⁺/_-0.031(stat)⁺/_-0.032(syst). Together with our previous 1993-1995 result, it yields a preliminary combined SLD jet-charge measurement of:A_b=0.849⁺/_-0.026(stat)⁺/_-0.031(syst).

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