dorsal/arxiv
View SchemaEnhancement of $\pi A \to \pi\pi A$ Threshold Cross Sections by In-Medium $\pi\pi$ Final State Interactions
| Authors | R. Rapp, J. W. Durso, Z. Aouissat, G. Chanfray, O. Krehl, P. Schuck, J. Speth, J. Wambach |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9810007 |
| URL | https://arxiv.org/abs/nucl-th/9810007 |
| DOI | 10.1103/PhysRevC.59.R1237 |
| Journal | Phys.Rev. C59 (1999) 1237-1241 |
Abstract
We address the problem of pion production in low energy $\pi$-nucleus collisions. For the production mechanism we assume a simple model consisting of a coherent sum of single pion exchange and the excitation---followed by the decay into two pions and a nucleon---of the $N^*(1440)$ resonance. The production amplitude is modified by the final state interaction between the pions calculated using the chirally improved J\"ulich meson exchange model including the polarization of the nuclear medium by the pions. The model reproduces well the experimentally observed $\pi A \to \pi\pi A$ cross sections, especially the enhancement with increasing $A$ of the $\pi^+\pi^-$ mass distribution in the threshold region.
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"abstract": "We address the problem of pion production in low energy $\\pi$-nucleus\ncollisions. For the production mechanism we assume a simple model consisting of\na coherent sum of single pion exchange and the excitation---followed by the\ndecay into two pions and a nucleon---of the $N^*(1440)$ resonance. The\nproduction amplitude is modified by the final state interaction between the\npions calculated using the chirally improved J\\\"ulich meson exchange model\nincluding the polarization of the nuclear medium by the pions. The model\nreproduces well the experimentally observed $\\pi A \\to \\pi\\pi A$ cross\nsections, especially the enhancement with increasing $A$ of the $\\pi^+\\pi^-$\nmass distribution in the threshold region.",
"arxiv_id": "nucl-th/9810007",
"authors": [
"R. Rapp",
"J. W. Durso",
"Z. Aouissat",
"G. Chanfray",
"O. Krehl",
"P. Schuck",
"J. Speth",
"J. Wambach"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.59.R1237",
"journal_ref": "Phys.Rev. C59 (1999) 1237-1241",
"title": "Enhancement of $\\pi A \\to \\pi\\pi A$ Threshold Cross Sections by In-Medium $\\pi\\pi$ Final State Interactions",
"url": "https://arxiv.org/abs/nucl-th/9810007"
},
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