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Measurements of R(b) with impact parameters and displaced vertices

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DOI: 10.1103/PhysRevD.53.1023
OAI: oai:inspirehep.net:394980
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INSPIRE-HEP
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Abstract

We present measurements of Rb using the SLD at the SLC. The analyses use 2D and 3D impact parameter tags and a displaced 3D vertex tag which all exploit the small size and stability of the e+e− interaction point and the precision 3D CCD pixel vertex detector to achieve high bb¯-tagging efficiencies and purities. The combined measurement yields Rb=0.229±0.011 and is consistent with standard model predictions. © 1996 The American Physical Society.

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