Measurement of Heavy Quark Forward-Backward Asymmetries and Average B Mixing Using Leptons in Hadronic Z Decays

TL;DR

This paper measures heavy quark forward-backward asymmetries and B mixing parameters in hadronic Z decays using leptons, providing insights into electroweak interactions and quark mixing.

Contribution

It introduces a method to simultaneously determine asymmetries and B mixing parameters from lepton data in Z decays, improving measurement accuracy.

Findings

Measured forward-backward asymmetries at three energies.

Determined the average B mixing parameter, chi.

Enhanced understanding of quark mixing and electroweak symmetry.

Abstract

Hadronic Z0 decays with identified electrons or muons have been used to measure the forward-backward asymmetries of e^+e^- --> Z0 --> bbbar and e^+e^- --> Z0 --> ccbar events. The asymmetries at three centre-of-mass energies, and the average B mixing parameter, chi, are determined in a simultaneous fit to events with one or two lepton candidates.