2011/01/27 by Huiying Song, Xinyu Zhang, Bo-Qiang Ma · 18 citations
Physics and Astronomy · #Asymmetry #Bar (unit) #Deep inelastic scattering #EMC effect #Fermilab #Flavor #High-Energy Particle Collisions Research #Meteorology #Nuclear physics #Nucleon #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjc/s10052-011-1542-4
published in The European Physical Journal C 71(2) (Springer Science+Business Media) · 10 pages, 8 figures, final version to appear in EPJC
arxiv created 2011/01/27 · openalex publication_date 2011/01/31 · arxiv updated 2015/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The light flavor antiquark distributions of the nucleon sea are calculated in the effective chiral quark model and compared with experimental results. The contributions of the flavor-symmetric sea-quark distributions and the nuclear EMC effect are taken into account to obtain the ratio of Drell-Yan cross sections σpD/2σpp, which can match well with the results measured in the FermiLab E866/NuSea experiment. The calculated results also match the measured d(x)-u(x) from different experiments, but unmatch the behavior of d(x)/u(x) derived indirectly from the measurable quantity σpD/2σpp by the FermiLab E866/NuSea Collaboration at large x. We suggest to measure again d(x)/u(x) at large x from precision experiments with careful experimental data treatment. We also propose an alternative procedure for experimental data treatment.