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Catani, Stefano; de Florian, Daniel; Rodrigo García, Germán Vicente; Vogelsang, Werner | |||
Aquest document és un/a article, creat/da en: 2004 | |||
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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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