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arXiv · hep-ph/0001146

Charge symmetry violation in the parton distributions of the nucleon

Fu-Guang Cao·A. I. Signal
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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.

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Fu-Guang Cao, A. I. Signal. 2000-01-16. Charge symmetry violation in the parton distributions of the nucleon. https://doi.org/10.1103/physrevc.62.015203

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