Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-04-21
Phys.Rev.Lett.83:2892-2895,1999
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 2 figures, Submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.83.2892
A surprisingly large charge symmetry violation of the sea quarks in the nucleon has been proposed in a recent article by Boros et al. as an explanation of the discrepancy between neutrino (CCFR) and muon (NMC) nucleon structure function data at low x. We show that these models are ruled out by the published CDF W charge asymmetry measurements, which strongly constrain the ratio of d and u quark momentum distributions in the proton over the x range of 0.006 to 0.34. This constraint also limits the systematic error from possible charge symmetry violation in the determination of sin^2(theta) from nu-N scattering experiments.
Bodek Arie
Fan Qicheng
Lancaster Mark
McFarland Kevin S.
Yang U. K.
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