{pi} and {rho} mesons, and their diquark partners, from a contact interaction

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.065206· OSTI ID:21502816

Roberts, H L. L. ^[1]; Bashir, A ^[2]; Gutierrez-Guerrero, L X ^[2]; Roberts, C D ^[1]; Wilson, D J ^[1]

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1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Instituto de Fisica y Matematicas, Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan 58040 (Mexico)

We present a unified Dyson-Schwinger equation treatment of static and electromagnetic properties of pseudoscalar and vector mesons, and scalar and axial-vector diquark correlations, based upon a vector-vector contact interaction. A basic motivation for this paper is the need to document a comparison between the electromagnetic form factors of mesons and those diquarks that play a material role in nucleon structure. A notable result, therefore, is the large degree of similarity between related meson and diquark form factors. The simplicity of the interaction enables computation of the form factors at arbitrarily large spacelike Q{sup 2}, which enables us to expose a zero in the {rho}-meson electric form factor at z{sub Q}{sup {rho}}{approx_equal}{radical}6m{sub {rho}}. Notably, r{sub {rho}}zQ{sup {rho}}{approx_equal}r{sub D}z{sub Q}{sup D}, where r{sub {rho}} and r{sub D} are, respectively, the electric radii of the {rho}-meson and deuteron.

• OSTI ID: 21502816
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.065206; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
CORRELATIONS
DEUTERONS
ELECTROMAGNETIC FORM FACTORS
INTERACTIONS
NUCLEONS
SIMULATION
VECTOR MESONS
BARYONS
BOSONS
CHARGED PARTICLES
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
EVALUATION
FERMIONS
FORM FACTORS
HADRONS
MESONS
PARTICLE PROPERTIES