dorsal/arxiv
View SchemaSpin observables for the pd <-> pi+ t process around the Delta resonance
| Authors | L. Canton, G. Cattapan, G. Pisent, W. Schadow, J. P. Svenne |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9801027 |
| URL | https://arxiv.org/abs/nucl-th/9801027 |
| DOI | 10.1103/PhysRevC.57.1588 |
| Journal | Phys.Rev.C57:1588-1594,1998 |
Abstract
The proton analyzing power Ay0 and the deuteron tensor analyzing power T20 are evaluated for the pd <-> pi+ t process, in the energy region around and above the Delta resonance. These calculations extend a previous analysis of the excitation function and differential cross-section, based on a model embodying one-- and two-body p-wave absorption mechanisms and isobar excitation. The three-nucleon bound state and the pd scattering state are evaluated through Faddeev techniques for both the Bonn and Paris potentials. The spin variables exhibit a greater sensitivity to the number of included three-nucleon partial waves than the cross-sections, while the role played by the initial-- or final-state interactions appears to be small. The results for the tensor analyzing power at backward angles show a non-negligible dependence on the potentials employed, consistently with what has been previously found for the cross-sections. The calculation of spin observables gives a clear indication that other reaction mechanisms (presumably s-wave two-body absorption) have to be included in the model, in order to reproduce the experimental data below the Delta-resonance, in analogy with the simpler pp <-> pi+ d process.
{
"annotation_id": "f6058390-e833-4d2a-8d9f-ee11915a67e1",
"date_created": "2026-03-02T18:00:22.037000Z",
"date_modified": "2026-03-02T18:00:22.037000Z",
"file_hash": "01a45dbcbd4c19beb86701d10a947aae0b9ece8e586912756dcb08c506e94c34",
"private": false,
"record": {
"abstract": "The proton analyzing power Ay0 and the deuteron tensor analyzing power T20\nare evaluated for the pd \u003c-\u003e pi+ t process, in the energy region around and\nabove the Delta resonance. These calculations extend a previous analysis of the\nexcitation function and differential cross-section, based on a model embodying\none-- and two-body p-wave absorption mechanisms and isobar excitation. The\nthree-nucleon bound state and the pd scattering state are evaluated through\nFaddeev techniques for both the Bonn and Paris potentials. The spin variables\nexhibit a greater sensitivity to the number of included three-nucleon partial\nwaves than the cross-sections, while the role played by the initial-- or\nfinal-state interactions appears to be small. The results for the tensor\nanalyzing power at backward angles show a non-negligible dependence on the\npotentials employed, consistently with what has been previously found for the\ncross-sections. The calculation of spin observables gives a clear indication\nthat other reaction mechanisms (presumably s-wave two-body absorption) have to\nbe included in the model, in order to reproduce the experimental data below the\nDelta-resonance, in analogy with the simpler pp \u003c-\u003e pi+ d process.",
"arxiv_id": "nucl-th/9801027",
"authors": [
"L. Canton",
"G. Cattapan",
"G. Pisent",
"W. Schadow",
"J. P. Svenne"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.1588",
"journal_ref": "Phys.Rev.C57:1588-1594,1998",
"title": "Spin observables for the pd \u003c-\u003e pi+ t process around the Delta resonance",
"url": "https://arxiv.org/abs/nucl-th/9801027"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "368f73cc-3ca6-473f-8e12-544da82d000d",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}