Phase-Shift Analysis of Pion-Nucleon Elastic Scattering below 1.6 GeV

Abstract

A phase-shift analysis of 7r-nucleon elastic scattering has been developed, one energy at a time, up to 1.6-GeV pion kinetic energy. This analysis differs from a previous one in that final experimental data and new polarization measurements are included. Particular care has been taken to have a coherent set of data

Statistical model calculation of the branching ratios ofN * (1470)

“…Now, the dipion resonance ~ (410) is a very controversial one (see, for example, the compilation [3]). Assuming that it does not exist, we found for the elastic mode a branching ratio of 0.637, in agreement with [8] and [9].…”

“…However, we gota branching fraction for the elastic mode of 0.442, in disagreement with other results found by partial wave analysis (0.68 in [8] and 0.658 in [9]). Now, the dipion resonance ~ (410) is a very controversial one (see, for example, the compilation [3]).…”

Pion-Nucleon Interactions

“…Samaranayake & Woolcock (12) have used 1. 24 with the assumption, consistent with the high-energy data, that above 10 GeV (13)3…”

Inverse Scattering Problem

“…(Bareyre et al 1968). In both these analyses the only assumption used is that of a regular behaviour with energy of the partial waves.…”