Meson elastic and transition form factors
Abstract
The Dyson-Schwinger equations of QCD, truncated to ladder-rainbow level, are used to calculate meson form factors in impulse approximation. The infrared strength of the ladder-rainbow kernel is described by two parameters fitted to the chiral condensate and fpi; the ultraviolet behavior is fixed by the QCD running coupling. This obtained elastic form factors Fpi(Q2) and FK(Q2) agree well with the available data. We also calculate the rho to pi gamma and K* to K gamma transition form factors, which are useful for meson-exchange models.
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