6533b86efe1ef96bd12cb4b2

RESEARCH PRODUCT

Perturbative generation of a strange-quark asymmetry in the nucleon

Werner VogelsangDaniel De FlorianStefano CataniGerman Rodrigo

subject

QuarkStrange quarkParticle physicsSTRANGECiencias Físicasmedia_common.quotation_subjectHigh Energy Physics::LatticeNuclear TheoryGeneral Physics and AstronomyDown quarkFOS: Physical sciencesStrangenessAsymmetry//purl.org/becyt/ford/1 [https]High Energy Physics - Phenomenology (hep-ph)PERTURBATIVENuclear Experimentmedia_commonPhysicsQuantum chromodynamicsValence (chemistry)High Energy Physics::PhenomenologyFísica//purl.org/becyt/ford/1.3 [https]AstronomíaHigh Energy Physics - PhenomenologyQuantum electrodynamicsASYMMETRYHigh Energy Physics::ExperimentNucleonCIENCIAS NATURALES Y EXACTAS

description

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.

yearjournalcountryeditionlanguage
2004-01-01
10.1103/physrevlett.93.152003http://arxiv.org/abs/hep-ph/0404240