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arXiv · hep-ph/0404240

Perturbative generation of a strange-quark asymmetry in the nucleon

Stefano Catani·Daniel de Florian·German Rodrigo·Werner Vogelsang
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Abstract

We point out that perturbative evolution in QCD at three loops generates a strange-antistrange asymmetry s(x)-sbar(x) in the nucleon's sea just from the fact that the nucleon has non-vanishing up and down quark valence densities. The recently computed three-loop splitting functions allow for an estimate of this effect. We find that a fairly sizable asymmetry may be generated. Results for analogous asymmetries in the heavy-quark sector are also presented.

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Stefano Catani, Daniel de Florian, German Rodrigo, Werner Vogelsang. 2004-04-27. Perturbative generation of a strange-quark asymmetry in the nucleon. https://doi.org/10.1103/physrevlett.93.152003

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