Perturbative generation of a strange-quark asymmetry in the nucleon

Details Perturbative generation of a strange-quark asymmetry in the nucleon Perturbative generation of a strange-quark asymmetry in the nucleon

2004-04-27

arxiv.org/abs/hep-ph/0404240v1

Phys.Rev.Lett. 93 (2004) 152003

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures included

Scientific paper

10.1103/PhysRevLett.93.152003

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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