Direct Measurement of the W Production Charge Asymmetry in pp¯ Collisions at s=1.96 TeV Academic Article uri icon


  • We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity yW in pp collisions at sqrt[s]=1.96 TeV. We use a sample of W-->enu events in data from 1 fb-1 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 functions of the charged-lepton pseudorapidity.

author list (cited authors)

  • Aaltonen, T., Adelman, J., Akimoto, T., González, B., Amerio, S., Amidei, D., ... Zucchelli, S.

citation count

  • 70

publication date

  • May 2009