Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW LETTERS 101, 191801 (2008). Copyright © 2008 The American Physical Society. Used by permission.


We present a measurement of the forward-backward charge asymmetry (AFB) in ppZ/γ* +Xe+e- + X events at a center-of-mass energy of 1.96 TeV using 1.1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider. AFB is measured as a function of the invariant mass of the electron-positron pair, and found to be consistent with the standard model prediction. We use the AFB measurement to extract the effective weak mixing angle sin2ӨWeff = 0.2326 ± 0.0018 (stat) ± 0.0006 (syst).

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