Measurement of the lepton charge asymmetry in W-Boson decays produced in pp collisions

CDF Collaboration

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We describe a measurement of the charge asymmetry of leptons from W-boson decays in the rapidity range 0 < |yl| < 2.5 using W → eν,μν events from 110±7pb-1 of data collected by the CDF detector during 1992–1995. The asymmetry data constrain the ratio of d and u quark momentum distributions in the proton over the x range of 0.006 to 0.34 at Q2 ≈ M2 W. The asymmetry predictions that use parton distribution functions obtained from previously published CDF data in the central rapidity region (0.0 < |yl| < 1.1) do not agree with the new data in the large rapidity region (|yl| > 1.1).

Original languageEnglish
Pages (from-to)5754-5759
Number of pages6
JournalPhysical Review Letters
Issue number26
Publication statusPublished - 1998 Jan 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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