Isobar model analysis of pi0-eta photoproduction on protons

TL;DR

This paper analyzes pi0-eta photoproduction on protons using an isobar model, explaining reaction features through dominant resonance waves and comparing results with recent experimental asymmetry data.

Contribution

It applies an isobar model to new MAMI C data for pi0-eta photoproduction, highlighting the dominance of D33 wave and resonance contributions.

Findings

D33 wave dominance explains main reaction features

Small admixture of positive parity resonances observed

Comparison with recent asymmetry data supports model validity

Abstract

Photoproduction of pi0-eta on protons in the energy range from threshold to 1.4 GeV is discussed. The data for representative angular distributions recently obtained at MAMI C are analyzed using an isobar model. The isobars considered are Delta(1232) and S11(1535) for pi0-p and eta-p states, respectively. In accordance with the results of earlier works the main features of the reaction are explained through the dominance of the D33 wave with a relatively small admixture of positive parity resonances. Comparison with recent experimental results for the photon beam asymmetry is carried out.