Perturbative Generation of a Strange-Quark Asymmetry in the Nucleon

2004/04/27 by Stefano Catani, Daniel de Florian, German Rodrigo +2 · 1 citation
Physics and Astronomy · #Asymmetry #High-Energy Particle Collisions Research #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Strange quark #Valence (chemistry) #hep-ph

paper · pdf · doi:10.1103/physrevlett.93.152003

published as Phys.Rev.Lett. 93 (2004) 152003 · 10 pages, 3 figures included

arxiv created 2004/04/27 · openalex publication_date 2004/10/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We point out that perturbative evolution in QCD at three loops generates a strange-antistrange asymmetry s(x) - s(x) in the nucleon's sea just from the fact that the nucleon has nonvanishing 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.

Citations

• The triple collinear limit of one-loop QCD amplitudes

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