2005/12/31 by Carl E. Carlson, Christopher D. Carone, Herry J. Kwee +1 · 2 citations
Mathematics · Physics and Astronomy · #Charge (physics) #Diquark #High-Energy Particle Collisions Research #Limit (mathematics) #Mathematical analysis #Mathematics #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Scalar (mathematics) #Wave function #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2006.02.050
published in Physics Letters B 635(2-3), 100-106 (Elsevier BV) · 12 pages, latex, 2 eps figures. v2: reference added. v3: discussion of results expanded
arxiv created 2006/02/16 · openalex publication_date 2006/03/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We argue that precise measurements of charge and magnetic radii can meaningfully constrain diquark models of the nucleon. We construct properly symmetrized, nonrelativistic three-quark wave functions that interpolate between the limits of a pointlike diquark pair and no diquark correlation. We find that good fits to the data can be obtained for a wide range of diquark sizes, provided that the diquark wave functions are close to those that reduce to a purely scalar state in the pointlike limit. A modest improvement in the experimental uncertainties will render a fit to the charge radii a more telling diagnostic for the presence of spatially correlated quark pairs within the nucleon.