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Measurement of the forward-backward charge asymmetry and extraction of sin**2 Theta(W)(eff) in p anti-p ---> Z/gamma* + X ---> e+ e- + X events produced at s**(1/2) = 1.96$-TeV.

By Iain Bertram, Guennadi Borissov, Harald Fox, Peter Love and Peter Ratoff

Abstract

We present a measurement of the forward-backward charge asymmetry (AFB) in ppbar -> Z/gamma -> X to e+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 sin^2 ^W _eff = 0.2326 +/- 0.0018(stat) +/- 0.0006 (syst)

Topics: QC Physics
Year: 2008
DOI identifier: 10.1103/PhysRevLett.101.191801
OAI identifier: oai:eprints.lancs.ac.uk:56872
Provided by: Lancaster E-Prints

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