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A model for the γN → ππN reaction

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	Gómez Tejedor, José Antonio; Oset Báguena, Eulogio Perfil
	This document is a artículo publicadoDate1996
	Este documento está disponible también en : http://hdl.handle.net/10550/12917
	We have studied the γN → ππN reaction using a model wich includes N, Δ(1232), N(1440) and N(1520) intermediate baryonic states and the ρ-meson as a intermediate ππ resonance. The model reproduces fairly well experimental cross sections below Eγ=800 MeV and invariant-mass distributions even at higher energies. One of the interesting findings of study is what the γN → N*(1520) → Δπ process is very important and interferes strongly with the dominant Δ-Kroll-Ruderman term to produce the experimental peak of the kross section.
	GOMEZ TEJEDOR, J.A. ; Oset Baguena, Eulogio, 1996, A model for the γN → ππN reaction, Acta Physica Polonica B, vol. 27, no. 11, p. 3171-3175
	http://th-www.if.uj.edu.pl/acta/vol27/pdf/v27p3171.pdf