1999/07/30 by K. Abe, Ken Abe, The SLD Collaboration +1
Computer Science · Engineering · Physics and Astronomy · #Advanced Data Storage Technologies #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Magnetic confinement fusion research #Plasma Diagnostics and Applications #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/9907066
10 pages, 2 figures. Paper contributed to EPS-HEP 99 and Lepton-Photon Symposium 1999
arxiv created 1999/07/30 · openalex publication_date 1999/07/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We report a new measurement of Ab using data obtained by SLD in 1997-98. This measurement uses a vertex tag technique, where the selection of a b hemisphere is based on the reconstructed mass of the bottom hadron decay vertex. The method uses the 3D vertexing capabilities of SLD's CCD vertex detector and the small and stable SLC beams to obtain a high b-event tagging efficiency and purity of 78% and 97%, respectively. Charged kaons identified by the CRID detector provide an efficient quark-antiquark tag, with the analyzing power calibrated from the data. We obtain a preliminary result of Ab = 0.997 ± 0.044 ± 0.067