New Measurement of Ab at the Z Resonance using a Vertex-Charge Technique

Details New Measurement of Ab at the Z Resonance using a Vertex-Charge Technique New Measurement of Ab at the Z Resonance using a Vertex-Charge Technique

1999-07-27

arxiv.org/abs/hep-ex/9907050v1

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 0 figures. Paper contributed to EPS-HEP 99 and Lepton-Photon Symposium 1999

Scientific paper

We present a new preliminary measurement of the parity-violation parameter Ab using a self-calibrating vertex-charge technique. In the SLD experiment we observe hadronic decays of polarized Z bosons produced in collisions between longitudinally polarized electrons and unpolarized positrons at the SLAC Linear Collider. A sample of bb events is selected using the topologically reconstructed mass of B hadrons. From out 1996-8 data sample of approximately 400,000 hadronic Z decays, we obtain Ab = 0.897 +/- 0.027 (stat) +0.036/-0.034 (syst).

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