Charge symmetry violation: a NNLO study of partonic observables
arXiv:1110.3594 · doi:10.1016/j.physletb.2012.01.003
Abstract
Charge and isospin symmetry violations to valence and sea distribution functions in the nucleon are evaluated (at low resolution scale) by means of a meson cloud model and light-cone quark wave functions. Their perturbative evolution are implemented at Next-to-next-to-leading order (NNLO) using an original evolution code in order to include the perturbatively generated strange - anti-strange asymmetry typical of the three loop evolution expansion. Charge symmetry violating QED effects are also added and the distributions, evolved at the experimental scale, are compared with available information. The role of non-perturbative effects is emphasized in the interpretation of the, so called, NuTeV anomaly and new experiments at very-high energy.
revtex4, 7 pages, 3 figures; text improved, new comments and references
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- Collinear parton distributions and the structure of the nucleon sea in a light-front meson-cloud model
- Perturbative and nonperturbative contributions to the strange quark asymmetry in the nucleon
- Electromagnetic contribution to charge symmetry violation in parton distributions
- Double parton distributions in Light-Front constituent quark models
- Double parton correlations in Light-Front constituent quark model