Space-like and time-like pion electromagnetic form factor and Fock state components within the Light-Front dynamics

Details Space-like and time-like pion electromagnetic form factor and Fock state components within the Light-Front dynamics Space-like and time-like pion electromagnetic form factor and Fock state components within the Light-Front dynamics

2005-07-29

arxiv.org/abs/hep-ph/0508001v1

Phys.Rev. D73 (2006) 074013

Physics

High Energy Physics

High Energy Physics - Phenomenology

74 pages, 11 figures, use revtex4

Scientific paper

10.1103/PhysRevD.73.074013

The simultaneous investigation of the pion electromagnetic form factor in the space- and time-like regions within a light-front model allows one to address the issue of non-valence components of the pion and photon wave functions. Our relativistic approach is based on a microscopic vector meson dominance (VMD) 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 -10 $(GeV/c)^2$, while in time-like region the model produces reasonable results up to 10 $(GeV/c)^2$.

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