An Isobar Model of e+ e- --> pi+ pi- pi0 pi0
arXiv:hep-ph/9501399
Abstract
In this paper, several calculations of the matrix elements for processes that may contribute to e+ e- --> pi+ pi- pi0 pi0 using the isobar model and the Lorentz invariant amplitude method are presented. The formulas may be used to determine the electromagnetic form factors of the rho meson if e+ e- --> rho+ rho- contributes to e+ e- --> pi+ pi- pi0 pi0 The electromagnetic form factors of the rho meson are predicted by QCD calculations. The formulas in this paper may be used to study the a_1 meson if e^+ e^- --> a_1 πcontributes to e+ e- --> pi+ pi- pi0 pi0.
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