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Meson model for f_0(980) production in peripheral pion-nucleon reactions

F. P. Sassen·S. Krewald·J. Speth
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Abstract

The Juelich model for pion-pion-scattering, based on an effective meson-meson Lagrangian is applied to the analysis of the S-wave production amplitudes derived from the BNL E852 experiment pi^- p -> pi^0 pi^0 n for a pion momentum of 18.3 GeV. The unexpected strong dependence of the S-wave partial wave amplitude on the momentum transfer between the proton and neutron in the vicinity of the f_0(980) resonance is explained in our analysis as interference effect between the correlated and uncorrelated pi^0 pi^0 pairs.

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F. P. Sassen, S. Krewald, J. Speth. 2003-10-09. Meson model for f_0(980) production in peripheral pion-nucleon reactions. https://doi.org/10.1103/physrevd.68.036003

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