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Perturbative generation of a strange-quark asymmetry in the nucleon
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Perturbative generation of a strange-quark asymmetry in the nucleon
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| Catani, Stefano; de Florian, Daniel; Rodrigo García, Germán Vicente; Vogelsang, Werner | |||
| This document is a artículoDate2004 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/44591 |
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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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Catani, Stefano de Florian, Daniel Rodrigo García, Germán Vicente Vogelsang, Werner 2004 Perturbative generation of a strange-quark asymmetry in the nucleon Physical Review Letters 93 15 152003 |
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| http://dx.doi.org/10.1103/PhysRevLett.93.152003 |
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