Effect of $\rho N$ channel in the $\gamma N\to \pi \pi N$ reactions

Abstract

A model for the two-pion photoproduction on the nucleon proposedearlier is modified to simultaneously explain the total cross sections and the invariant mass spectra. Using this model, we discuss the role of the $\rho$ meson in the $\gamma N\to \pi \pi N$ reaction.

Comments: 11 pages, 8 ps figures, uses revtex.sty, here.sty, psfig.sty