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Type: Journal article
Title: Electromagnetic form factors of light vector mesons
Author: Hawes, Frederick T.
Pichowsky, M. A.
Citation: Physical Review C, 1999; 59(3):1743-1750
Publisher: American Physical Society
Issue Date: 1999
ISSN: 0556-2813
School/Discipline: School of Chemistry and Physics : Physics and Mathematical Physics
Statement of
F. T. Hawes, M. A. Pichowsky
Abstract: The electromagnetic form factors GE(q²), GM(q²), and GQ(q²), charge radii, magnetic and quadrupole moments, and decay widths of the light vector mesons ρ⁺,K*⁺, and K*0 are calculated in a Lorentz-covariant, Dyson-Schwinger-equation-based model using algebraic quark propagators that incorporate confinement, asymptotic freedom, and dynamical chiral symmetry breaking, and vector-meson Bethe-Salpeter amplitudes closely related to the pseudoscalar amplitudes obtained from phenomenological studies of π and K mesons. Calculated static properties of vector mesons include the charge radii and magnetic moments 〈rρ+²〉1/2=0.61 fm, 〈rK*⁺²〉1/2=0.54 fm, and 〈rK*0²〉=-0.048 fm² and μρ+=2.69, μK*⁺=².37, and μK*0=-0.40. The calculated static limits of the ρ-meson form factors are similar to those obtained from light-front quantum mechanical calculations, but begin to differ above q²=1 GeV2 due to the dynamical evolution of the quark propagators in our approach.
Rights: © 1999 The American Physical Society
DOI: 10.1103/PhysRevC.59.1743
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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