Photoabsorption on a Nucleon in the D_{13} Resonance Energy Region

Abstract

We present a simple model for the $\gamma N\to \pi \pi N$ reaction which reproduces the cross sections of the ${\pi }^{+}{\pi }^{-}p,{\pi }^{+}{\pi }^{-}n,{\pi }^{+}{\pi }^{0}n$ and ${\pi }^{-}{\pi }^{0}p$ channels over the range of the energies 0.41-0.85 GeV. We use the dynamical model for the resonances, Δ(1232), N^*(1520) and ρ-meson. The total photoabsorption off a nucleon is also discussed.

Revtex file, 25 pages, 8 figures, uses here.sty, psfig.sty

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