dorsal/arxiv
View SchemaNucleon Resonance Effects in $pp\to pp\pi^0$ near Threshold
| Authors | M. T. Peña, D. O. Riska, A. Stadler |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9902066 |
| URL | https://arxiv.org/abs/nucl-th/9902066 |
| DOI | 10.1103/PhysRevC.60.045201 |
| Journal | Phys.Rev. C60 (1999) 045201 |
Abstract
The role of the low lying nucleon resonances beyond the $\Delta(1232)$ in the reaction $pp\to pp\pi^0$ near threshold is shown to be numerically significant by a calculation, which takes into account the pion re-scattering contribution described by chiral perturbation theory and the short-range mechanisms that are implied by the nucleon-nucleon interaction model. The intermediate N(1440) (P$_{11}$) resonance is excited by the short-range exchange mechanisms, while the N(1535) ($S_{11}$) and N(1520) ($D_{13}$) resonances are excited by $\eta$ and $\rho$ meson exchange, respectively. The $P_{11}$ increases the calculated cross section, whereas the $S_{11}$ and $D_{13}$ resonances decrease it. The calculation takes full account of the initial and final state interactions.
{
"annotation_id": "afba3c2f-901a-47b2-b1ab-aea4dfc8eb16",
"date_created": "2026-03-02T18:00:25.088000Z",
"date_modified": "2026-03-02T18:00:25.088000Z",
"file_hash": "de6d79a16ca285532928b406259cec1c58c094a780f2438a43c55e3ce8e4e9c5",
"private": false,
"record": {
"abstract": "The role of the low lying nucleon resonances beyond the $\\Delta(1232)$ in the\nreaction $pp\\to pp\\pi^0$ near threshold is shown to be numerically significant\nby a calculation, which takes into account the pion re-scattering contribution\ndescribed by chiral perturbation theory and the short-range mechanisms that are\nimplied by the nucleon-nucleon interaction model. The intermediate N(1440)\n(P$_{11}$) resonance is excited by the short-range exchange mechanisms, while\nthe N(1535) ($S_{11}$) and N(1520) ($D_{13}$) resonances are excited by $\\eta$\nand $\\rho$ meson exchange, respectively. The $P_{11}$ increases the calculated\ncross section, whereas the $S_{11}$ and $D_{13}$ resonances decrease it. The\ncalculation takes full account of the initial and final state interactions.",
"arxiv_id": "nucl-th/9902066",
"authors": [
"M. T. Pe\u00f1a",
"D. O. Riska",
"A. Stadler"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.60.045201",
"journal_ref": "Phys.Rev. C60 (1999) 045201",
"title": "Nucleon Resonance Effects in $pp\\to pp\\pi^0$ near Threshold",
"url": "https://arxiv.org/abs/nucl-th/9902066"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "a96a46a4-330b-4d35-8455-77981e1c825a",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}