Measurement of the forward-backward charge asymmetry of electron-positron pairs in pp̅ collisions at sqrt(s)=1.96 TeV

Authors

Darin Acosta, University of FloridaFollow
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Document Type

Article

Date of this Version

3-25-2005

Comments

Published by American Physical Society. Phys. Rev. D 71, 052002 (2005). http://prd.aps.org/. Copyright © 2005 American Physical Society. Permission to use.

Abstract

We present a measurement of the mass dependence of the forward-backward charge asymmetry (A_FB) for e⁺e^- pairs produced via an intermediate Z/ γ * with mass M_ee>40 GeV/c². We study the constraints on the Z-quark couplings imposed by our measurement. We analyze an integrated luminosity of 72 pb^-1 collected by the CDF-II detector in pp̅ collisions at √s =1.96 TeV at the Fermilab Tevatron. A comparison of the uncorrected A_FB between data and standard model Monte Carlo gives good agreement with a chi²/DOF of 15.7/15. The couplings measurements are also consistent with standard model predictions.