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D0_2008_S7837160

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Measurement of the electron charge asymmetry in $p \bar p \to W + X \to e \nu_e + X$ events at a center of mass energy of 1.96 TeV. The asymmetry is measured as a function of the electron transverse momentum and pseudorapidity in the interval (-3.2, 3.2). This data is sensitive to proton parton distribution functions due to the valence asymmetry in the incoming quarks which produce the W. Initial state radiation should also affect the pT distribution.

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