Pion electromagnetic form factor and Fock state components

• Autor(a) principal: De Melo, J. P.B.C.
• Data de Publicação: 2006
• Outros Autores: Frederick, T., Pace, E., Salmè, G.
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1063/1.2220291; http://hdl.handle.net/11449/231031
• topic: Electromagnetic form factors; Pion; Relativistic quark model; Vector- meson dominance

The pion electromagnetic form factor in the space- and time-like regions are for the first time analyzed within a light-front model, that allows one to address the fundamental issue of non-valence components of the pion and photon wave functions. Our relativistic approach is based on a microscopic vector meson dominance model for the dressed quark-photon vertex, and on a simple parametrization for the emission /absorption of a pion by a quark. The comparison with the experimental data shows a high quality agreement in the whole kinematical region explored. © 2006 American Institute of Physics.