dorsal/arxiv
View SchemaThe N N -> NN pi+ Reaction near Threshold in a Chiral Power Counting Approach
| Authors | C. A. da Rocha, G. A. Miller, U. van Kolck |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9904031 |
| URL | https://arxiv.org/abs/nucl-th/9904031 |
| DOI | 10.1103/PhysRevC.61.034613 |
| Journal | Phys.Rev. C61 (2000) 034613 |
Abstract
Power-counting arguments are used to organize the interactions contributing to the N N -> d pi, p n pi reactions near threshold. We estimate the contributions from the three formally leading mechanisms: the Weinberg-Tomozawa (WT) term, the impulse term, and the $\Delta$-excitation mechanism. Sub-leading but potentially large mechanisms, including $S$-wave pion-rescattering, the Galilean correction to the WT term, and short-ranged contributions are also examined. The WT term is shown to be numerically the largest, and the other contributions are found to approximately cancel. Similarly to the reaction p p -> p p pi0, the computed cross sections are considerably smaller than the data. We discuss possible origins of this discrepancy.
{
"annotation_id": "775f1fce-01e7-4922-b866-81a808fa91c9",
"date_created": "2026-03-02T18:00:25.762000Z",
"date_modified": "2026-03-02T18:00:25.762000Z",
"file_hash": "98aa94621db98fc9d5f40c52d697c17095a1b05f92a2a2f22d67b30212b268b0",
"private": false,
"record": {
"abstract": "Power-counting arguments are used to organize the interactions contributing\nto the N N -\u003e d pi, p n pi reactions near threshold. We estimate the\ncontributions from the three formally leading mechanisms: the Weinberg-Tomozawa\n(WT) term, the impulse term, and the $\\Delta$-excitation mechanism. Sub-leading\nbut potentially large mechanisms, including $S$-wave pion-rescattering, the\nGalilean correction to the WT term, and short-ranged contributions are also\nexamined. The WT term is shown to be numerically the largest, and the other\ncontributions are found to approximately cancel. Similarly to the reaction p p\n-\u003e p p pi0, the computed cross sections are considerably smaller than the data.\nWe discuss possible origins of this discrepancy.",
"arxiv_id": "nucl-th/9904031",
"authors": [
"C. A. da Rocha",
"G. A. Miller",
"U. van Kolck"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.61.034613",
"journal_ref": "Phys.Rev. C61 (2000) 034613",
"title": "The N N -\u003e NN pi+ Reaction near Threshold in a Chiral Power Counting Approach",
"url": "https://arxiv.org/abs/nucl-th/9904031"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "f8c7944d-2758-4654-9982-5abae6bdd2f8",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}