Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 73: Hadronenstruktur und -spektroskopie

HK 73.8: Talk

Thursday, March 7, 2013, 18:45–19:00, HSZ-105

Two-pion production in the first resonance energy region — •Vitaly Shklyar, Horst Lenske und Ulrich Mosel — Institut für Theoretische Physik, Universität Gießen

The π N → π N, 2π N reactions are analyzed within a coupled-channel unitary Lagrangian model. The contributions to 2π N are described in terms of the isobar production mechanism with σ N and π Δ in the intermediate state. The self-energies of the σ-meson and the Δ(1232)-isobar are taken into account to reproduce a correct energy behavior of resonance decays in the isobar channel. The analysis of the Crystal Ball data on 2π⁰ production is presented and discussed.