A Model for Dipole Electromagnetic Form Factors
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概要
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A model of the electromagnetic form factor of the scalar π meson is discussed in which the π meson is a bound state of scalar nucleon-antinucleon system. Starting from an exact integral representation of the form factor, which is well defined in a space-like region of the momentum transfer squared, q^2, an analytic continuation of the representation is performed under some plausible assumptions on dynamics and a simple pole definition of a resonance in the _<π->N scattering amplitude. It is shown that the singularities of the form factor corresponding to resonances turn out to be dipoles and not simple poles contrary to the widely held belief. A generalization to the other hadron cases is discussed in the quark model scheme.
- 理論物理学刊行会の論文
- 1971-09-25
著者
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Yamada Masao
Center For Particle Theory Department Of Physics The University Of Texas
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YAMADA Masao
Center for Particle Theory, Department of Physics The University of Texas