Charge symmetry violation in the parton distributions of the nucleon

Details Charge symmetry violation in the parton distributions of the nucleon Charge symmetry violation in the parton distributions of the nucleon

2000-01-16

arxiv.org/abs/hep-ph/0001146v1

Phys.Rev. C62 (2000) 015203

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 26 pages, 6 PostScript figures

Scientific paper

10.1103/PhysRevC.62.015203

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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