dorsal/arxiv
View SchemaElectromagnetic form factors of light vector mesons
| Authors | F. T. Hawes, M. A. Pichowsky |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9806025 |
| URL | https://arxiv.org/abs/nucl-th/9806025 |
| DOI | 10.1103/PhysRevC.59.1743 |
| Journal | Phys.Rev.C59:1743-1750,1999 |
Abstract
The electromagnetic form factors G_E(q^2), G_M(q^2), and G_Q(q^2), charge radii, magnetic and quadrupole moments, and decay widths of the light vector mesons rho^+, 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 pi and K mesons. Calculated static properties of vector mesons include the charge radii and magnetic moments: r_{rho+} = 0.61 fm, r_{K*+} = 0.54 fm, and r^2_{K*0} = -0.048 fm^2; mu_{rho+} = 2.69, mu_{K*+} = 2.37, and mu_{K*0} = -0.40. The calculated static limits of the rho-meson form factors are similar to those obtained from light-front quantum mechanical calculations, but begin to differ above q^2 = 1 GeV^2 due to the dynamical evolution of the quark propagators in our approach.
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"abstract": "The electromagnetic form factors G_E(q^2), G_M(q^2), and G_Q(q^2), charge\nradii, magnetic and quadrupole moments, and decay widths of the light vector\nmesons rho^+, K^{*+} and K^{*0} are calculated in a Lorentz-covariant,\nDyson-Schwinger equation based model using algebraic quark propagators that\nincorporate confinement, asymptotic freedom, and dynamical chiral symmetry\nbreaking, and vector meson Bethe-Salpeter amplitudes closely related to the\npseudoscalar amplitudes obtained from phenomenological studies of pi and K\nmesons. Calculated static properties of vector mesons include the charge radii\nand magnetic moments: r_{rho+} = 0.61 fm, r_{K*+} = 0.54 fm, and r^2_{K*0} =\n-0.048 fm^2; mu_{rho+} = 2.69, mu_{K*+} = 2.37, and mu_{K*0} = -0.40. The\ncalculated static limits of the rho-meson form factors are similar to those\nobtained from light-front quantum mechanical calculations, but begin to differ\nabove q^2 = 1 GeV^2 due to the dynamical evolution of the quark propagators in\nour approach.",
"arxiv_id": "nucl-th/9806025",
"authors": [
"F. T. Hawes",
"M. A. Pichowsky"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.59.1743",
"journal_ref": "Phys.Rev.C59:1743-1750,1999",
"title": "Electromagnetic form factors of light vector mesons",
"url": "https://arxiv.org/abs/nucl-th/9806025"
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