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, \Delta(1232), N^*(1520) and \rho-meson. The total photoabsorption off a nucleon is also discussed.

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