121211837
The couplings of heavy quarks to the Z0 boson
Abstract In this paper we present an overview of the results on the coupling of the heavy quarks ( b and c ) to the Z 0 boson from the SLD detector at SLAC. These results are final or almost final, based on the full 1993–1998 dataset of 550 000 hadronic Z 0 decays produced with an average electron polarization of 73%. The measurements are of the hadronic branching fractions into heavy quarks ( R b , R c ), the b quark asymmetry ( A b ) using jet charge, and the heavy quark asymmetries ( A b and A c ) using leptons and using vertex charge and kaons.
118128541
The Determination of the branching ratios of the Z0 boson into heavy quarks using neural networks
17588777
High-precision measurement of the left-right Z Boson cross-section asymmetry.
We present a measurement of the left-right cross-section asymmetry ( A(LR)) for Z boson production by e(+)e(-) collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996-1998. Using a sample of 383 487 Z decays collected during the 1996-1998 runs we measure the pole value of the asymmetry, A(0)(LR), to be 0.150 56+/-0.002 39 which is equivalent to an effective weak mixing angle of sin (2)straight theta(eff)(W) = 0.231 07+/-0.000 30. Our result for the complete 1992-1998 data set comprising approximately 537 000 Z decays is sin (2)straight theta(eff)(W) = 0.230 97+/-0.000 27.
3018976
Higgs production and background at LEP
AbstractWe calculate the total cross section for the process
$$e^ + e^ - \to \mu ^ + \mu ^ - b\bar b$$
 at tree level for LEP energies. We take into account the Higgs production subprocess, background processes with two intermediate vector bosons and their interference. A Higgs lighter than 50GeV could be observed at LEP 1. In this case the background can easily be eliminated. For a heavier Higgs we need LEP 200 energies. Here we will get a significant background from doubleZ production.
117763262
Electroweak results from SLD
In this paper we present three updates to heavy flavour results from the SLD detector at SLAC. These results are preliminary, based on our full 1993-1998 dataset of 550 000 hadronic Z0 decays produced with an average electron polarisation of 73%. The new measurements are of the hadronic branching fractions into heavy quarks (Rb, Rc), the b quark asymmetry (Ab) using jet charge, and the heavy quark asymmetries (Ab and Ac) using vertex charge and kaons.
201088930
Direct measurement of A(b) and A(c) at the Z(0) pole using a lepton tag
The parity violation parameters Ab and Ac of the Zb anti-b and Zc anti-c couplings have been measured directly, using the polar angle dependence of the Z0-pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron identification algorithms take advantage of new multivariate techniques, incorporating for the first time information from the SLD Cerenkov Ring Imaging Detector. Based on the 1993-95 SLD sample of 150,000 Z0 decays produced with highly polarized electron beams, we measure: Ab = 0.910 ± 0.068(stat) ± 0.037(syst) Ac = 0.642 ± 0.110(stat) ± 0.063(syst).
122735400
From pixels to physics
Abstract We review vertexing algorithms in an e + e − environment. Methods for topological vertexing, heavy flavour tagging, vertex charge reconstruction and charge dipole tagging are presented together with results from the SLD CCD vertex detector and design studies for the TESLA CCD vertex detector.