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 <b(b)over bar>-tagging efficiencies and purities. The combined measurement yields R(b) = 0.229 +/- 0.011 and is consistent with standard model predictions.
Measurements of R(b) with impact parameters and displaced vertices
BISELLO, DARIO;
1996
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
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