Showing papers by "J. J. Veillet published in 2001"
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TL;DR: In this article, a lower bound of 107.7 GeV/c^2 at 95% confidence level is established for the mass of the neutral Higgs boson h and A.
32 citations
01 Aug 2001
14 citations
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TL;DR: In this paper, an optimal hemisphere charge estimator is built by merging primary and secondary vertex information, leading to high performance tagging of b-barb events in a wide angular range.
Abstract: Based on a sample of four million events collected by ALEPH from 1991 to 1995, a measurement of the forward-backward asymmetry in Z -> b-barb decays using inclusive final states is presented. High-performance tagging of b-barb events in a wide angular range is achieved using neural network techniques. An optimal hemisphere charge estimator is built by merging primary and secondary vertex information, leading kaon identification and jet charge in a neural network. The average charge asymmetry, the flavour tagging efficiencies and mean b-hemisphere charges are measured from data and used to extract the pole b asymmetry in the Standard Model A^{0,b}_{FB} = 0.1009 +- 0.0027 (stat) +- 0.0015 (syst) , corresponding to a value of the effective weak mixing angle of sin^2(theta_W^{eff}) = 0.23193 +- 0.00056.
14 citations