dorsal/arxiv
View SchemaElectroproduction of the Roper resonance and the constituent quark model
| Authors | F. Cardarelli, E. Pace, G. Salme', S. Simula |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9609047 |
| URL | https://arxiv.org/abs/nucl-th/9609047 |
| DOI | 10.1016/S0370-2693(97)00149-4 |
| Journal | Phys.Lett. B397 (1997) 13-19 |
Abstract
A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic transition form factors is performed within a light-front constituent quark model, using for the first time the eigenfunctions of a mass operator which generates a large amount of configuration mixing in baryon wave functions. A one-body electromagnetic current, which includes the phenomenological constituent quark form factors already determined from an analysis of pion and nucleon experimental data, is adopted. For $Q^2$ up to few $(GeV/c)^2$, at variance with the enhancement found in the elastic channel, the effect of configuration mixing results in a significant suppression of the calculated helicity amplitudes with respect to both relativistic and non-relativistic calculations, based on a simple gaussian-like ansatz for the baryon wave functions.
{
"annotation_id": "6915b55f-fe1b-43c0-a399-118ba127c894",
"date_created": "2026-03-02T18:00:18.844000Z",
"date_modified": "2026-03-02T18:00:18.844000Z",
"file_hash": "2fbef86d39e4f610d895718dff2a3292aa2cd60429af8debaec1d3c0306e59c0",
"private": false,
"record": {
"abstract": "A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic\ntransition form factors is performed within a light-front constituent quark\nmodel, using for the first time the eigenfunctions of a mass operator which\ngenerates a large amount of configuration mixing in baryon wave functions. A\none-body electromagnetic current, which includes the phenomenological\nconstituent quark form factors already determined from an analysis of pion and\nnucleon experimental data, is adopted. For $Q^2$ up to few $(GeV/c)^2$, at\nvariance with the enhancement found in the elastic channel, the effect of\nconfiguration mixing results in a significant suppression of the calculated\nhelicity amplitudes with respect to both relativistic and non-relativistic\ncalculations, based on a simple gaussian-like ansatz for the baryon wave\nfunctions.",
"arxiv_id": "nucl-th/9609047",
"authors": [
"F. Cardarelli",
"E. Pace",
"G. Salme\u0027",
"S. Simula"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0370-2693(97)00149-4",
"journal_ref": "Phys.Lett. B397 (1997) 13-19",
"title": "Electroproduction of the Roper resonance and the constituent quark model",
"url": "https://arxiv.org/abs/nucl-th/9609047"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "ca6aba9a-5a01-4bef-ad6e-3528bc6bf128",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}