## Abstract

The forward-backward charge asymmetries of the b and c quarks are measured with the JADE detector at PETRA at {Mathematical expression} GeV and 44 GeV using both electrons and muons to tag the heavy quarks. At {Mathematical expression} GeV, a simultaneous fit for the two asymmetries yields the result A_{b}=-9.3±5.2% (state.) nd A_{c}=-9.6±4.0% (stat.). The systematic errors are comparable with the statistical uncertainties. Combining the measurements at both energies and alternately constraining the weak coupling of the c and b quark to their Standard Model values (a_{c}=1, a_{b}=-1) increases the precision of the measurement of coupling constant of the other quark. Using this procedure a_{b}=-0.72±0.34 and a_{c}=0.79±0.40, where the numbers are corrected for {Mathematical expression} and the errors include both statistical and systematic contributions. The mixing parameter for continuum {Mathematical expression} is determined to be χ-0.24±0.12 if both heavy quark coupling constants are constrained to their values in the Standard Model.

Original language | English |
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Pages (from-to) | 349-359 |

Number of pages | 11 |

Journal | Zeitschrift für Physik C Particles and Fields |

Volume | 46 |

Issue number | 3 |

DOIs | |

Publication status | Published - 1990 Sept |

Externally published | Yes |

## ASJC Scopus subject areas

- Physics and Astronomy (miscellaneous)