Direct Measurement of the WW Production Charge Asymmetry in \ppbar Collisions at s=1.96\sqrt{s} = 1.96 TeV

Abstract

submitted to Phys. Rev. LettWe present the first direct measurement of the WW production charge asymmetry as a function of the WW boson rapidity \yW in \ppbar collisions at s=1.96\sqrt{s} = 1.96 \TeV. We use a sample of \wenu events in data from 1 \ifb of integrated luminosity collected using the CDF II detector. In the region |\yW| < 3.0, this measurement is capable of constraining the ratio of up and down quark momentum distributions in the proton more directly than in previous measurements of the asymmetry that are a function of the charged-lepton pseudorapidity

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