Abstract
The simultaneous investigation of the pion electromagnetic form factor in the space- and timelike regions within a light-front model allows one to address the issue of nonvalence components of the pion and photon wave functions. Our relativistic approach is based on a microscopic vector-meson-dominance model for the dressed vertex where a photon decays in a quark-antiquark pair, and on a simple parametrization for the emission or absorption of a pion by a quark. The results show an excellent agreement in the space like region up to $\ensuremath{-}10\text{ }\text{ }(\mathrm{GeV}/c{)}^{2}$, while in timelike region the model produces reasonable results up to $10\text{ }\text{ }(\mathrm{GeV}/c{)}^{2}$.
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