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- W2316277645 abstract "The relativistic point-form formalism that we proposed for the study of the electroweak structure of few-body bound states is applied to calculate the elastic form factors of spin-1 mesons, such as the $ensuremath{rho}$, within constituent-quark models. We treat electron-meson scattering as a Poincar'e-invariant coupled-channel problem for a Bakamjian-Thomas mass operator and extract the meson current from the resulting invariant 1-photon-exchange amplitude. Wrong cluster properties inherent in the Bakamjian-Thomas framework are seen to cause spurious contributions in the current. These contributions, however, can be separated unambiguously from the physical ones and we end up with a meson current with all required properties. Numerical results for the $ensuremath{rho}$-meson form factors are presented assuming a simple harmonic-oscillator bound-state wave function. The comparison with other approaches reveals a remarkable agreement of our results with those obtained within the covariant light-front scheme proposed by Carbonell et al. [Phys. Rep. 300, 215 (1998)]." @default.
- W2316277645 created "2016-06-24" @default.
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- W2316277645 date "2014-05-16" @default.
- W2316277645 modified "2023-09-27" @default.
- W2316277645 title "Electromagneticρ-meson form factors in point-form relativistic quantum mechanics" @default.
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- W2316277645 doi "https://doi.org/10.1103/physrevc.89.055205" @default.
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