Charge symmetry violation in the parton distributions of the nucleon

Abstract

We point out that charge symmetry violation in both the valence and sea quark distributions of the nucleon has a non-perturbative source. We calculate this non-perturbative charge symmetry violation using the meson cloud model, which has earlier been successfully applied to both the study of SU(2) flavour asymmetry in the nucleon sea and quark-antiquark asymmetry in the nucleon. We find that the charge symmetry violation in the valence quark distribution is well below 1%, which is consistent with most low energy tests but significantly smaller than the quark model prediction about 5%-10%. Our prediction for the charge symmetry violation in the sea quark distribution is also much smaller than the quark model calculation.

RevTex, 26 pages, 6 PostScript figures

References in corpus (3)

• On the phenomenological analyses of $s$-$\bar{s}$ asymmetry in the nucleon sea
• A New Analysis of Charge Symmetry Violation in Parton Distributions
• Update of MRST partons

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• Effect due to charge symmetry violation on the Paschos-Wolfenstein relation