volume 42, issue 1, P20-29 1990
DOI: 10.1103/physrevd.42.20
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Abstract: Using only the analytic structure of the K matrix and the assumption that the Comptonscattering amplitude is small compared to strong and electrostrong amplitudes, we extract the pole position and the residues for the resonant multipoles, in a model-independent and background-free fashion, directly from the experimentally obtained multipole data base in the A(1232) region, posing a challenge for QCD-inspired hadron models.

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