Publicação: Electromagnetic form factor of the pion in the space- and time-like regions within the front-form dynamics
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The pion electromagnetic form factor is calculated in the space- and time-like regions from -10 (GeV/c)2 up to 10 (GeV/c)2, within a front-form model. The dressed photon vertex where a photon decays in a quark-antiquark pair is depicted generalizing the vector meson dominance ansatz, by means of the vector meson vertex functions. An important feature of our model is the description of the on-mass-shell vertex functions in the valence sector, for the pion and the vector mesons, through the front-form wave functions obtained within a realistic quark model. The theoretical results show an excellent agreement with the data in the space-like region, while in the time-like region the description is quite encouraging. © 2003 Elsevier B.V. All rights reserved.
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Electromagnetic form factors, Pion, Relativistic quark model, Vector-meson dominance, calculation, electromagnetic field, molecular dynamics, molecular model, photon, pion, space, time, waveform
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Inglês
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 581, n. 1-2, p. 75-81, 2004.
