Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-06-03
Phys.Rev.Lett.81:4075-4078,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 3 postscript figures
Scientific paper
10.1103/PhysRevLett.81.4075
In principle one can test the validity of charge symmetry for parton distributions by comparing structure functions measured in neutrino and charged lepton deep inelastic scattering. New experiments make such tests possible; they provide rather tight upper limits on parton charge symmetry violation [CSV] for intermediate Bjorken x, but appear to show evidence for CSV effects at small x. We examine two effects which might account for this experimental discrepancy: nuclear shadowing corrections for neutrinos, and strange quark contributions s(x) unequal to sbar(x). We show that neither of these two corrections removes the experimental discrepancy between the structure functions. We are therefore forced to consider the possibility of a surprisingly large CSV effect in the nucleon sea quark distributions.
Boros C.
Londergan Timothy J.
Thomas Anthony W.
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