A Measurement of Rb using a Vertex Mass Tag
High Energy Physics - Experiment
2012-08-27 v1
Abstract
We report a new measurement of Rb = Gamma(Z0->b-bbar) / Gamma(Z0->hadrons) using a double tag technique, where the b hemisphere selection is based on the reconstructed mass of the B hadron decay vertex. The measurement was performed using a sample of 130k hadronic Z0 events, collected with the SLD at the SLC. The method utilizes the 3-D vertexing abilities of the CCD pixel vertex detector and the small stable SLC beams to obtain a high b-tagging efficiency and purity. We obtain Rb=0.2142+/-0.0034(stat.)+/-0.0015(syst.)+/-0.0002(R_c).
Cite
@article{arxiv.hep-ex/9708015,
title = {A Measurement of Rb using a Vertex Mass Tag},
author = {SLD Collaboration},
journal= {arXiv preprint arXiv:hep-ex/9708015},
year = {2012}
}
Comments
11 pages including 3 eps files