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Measurement of \(A_{\rm FB}^b\) using inclusive \(b\)-hadron decays

  • The ALEPH Collaboration
  • A. Heister et al.
Experimental physcis

Abstract.

Based on a sample of four million events collected by ALEPH from 1991 to 1995, a measurement of the forward-backward asymmetry in \(Z \rightarrow b\bar{b}\) decays using inclusive final states is presented. High-performance tagging of \(b\bar{b}\) 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

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corresponding to a value of the effective weak mixing angle of

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Keywords

Neural Network Angular Range Charge Asymmetry Average Charge Secondary Vertex 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • The ALEPH Collaboration
  • A. Heister et al.
    • 1
  1. 1.Physikalisches Institut das RWTH-Aachen, 52056 Aachen, GermanyDE

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