A Remark on Vector Meson Dominance, Universality and the Pion Form Factor

Details A Remark on Vector Meson Dominance, Universality and the Pion Form Factor A Remark on Vector Meson Dominance, Universality and the Pion Form Factor

2006-03-13

arxiv.org/abs/hep-ph/0603096v1

ActaPhys.Polon.B38:2077-2082,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, RevTeX 4

Scientific paper

In this paper, we address the universality problem in the mass-mixing representation of vector meson dominance. First we stress the importance of using physical (mass eigenstate) fields in order to get the correct $q^2$ dependence of the pion form factor. Then we show that, when a direct coupling of the (proto-)photon to the pions is included, it is not necessary to invoke universality. Our method is similar to the delocalization idea in some deconstrunction theories.

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