dorsal/arxiv
View SchemaParity-Violating Interaction Effects in the np System
| Authors | R. Schiavilla, J. Carlson, M. Paris |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0404082 |
| URL | https://arxiv.org/abs/nucl-th/0404082 |
| DOI | 10.1103/PhysRevC.70.044007 |
| Journal | Phys.Rev.C70:044007,2004 |
Abstract
We investigate parity-violating observables in the np system, including the longitudinal asymmetry and neutron-spin rotation in np elastic scattering, the photon asymmetry in np radiative capture, and the asymmetries in deuteron photo-disintegration d(gamma,n)p in the threshold region and electro-disintegration d(e,e`)np in quasi-elastic kinematics. To have an estimate of the model dependence for the various predictions, a number of different, latest-generation strong-interaction potentials--Argonne v18, Bonn 2000, and Nijmegen I--are used in combination with a weak-interaction potential consisting of pi-, rho-, and omega-meson exchanges--the model known as DDH. The complete bound and scattering problems in the presence of parity-conserving, including electromagnetic, and parity-violating potentials is solved in both configuration and momentum space. The issue of electromagnetic current conservation is examined carefully. We find large cancellations between the asymmetries induced by the parity-violating interactions and those arising from the associated pion-exchange currents. In the np capture, the model dependence is nevertheless quite small, because of constraints arising through the Siegert evaluation of the relevant E1 matrix elements. In quasi-elastic electron scattering these processes are found to be insignificant compared to the asymmetry produced by gamma-Z interference on individual nucleons.
{
"annotation_id": "1e846184-2662-448a-b38f-0ab5a8c40203",
"date_created": "2026-03-02T18:00:00.890000Z",
"date_modified": "2026-03-02T18:00:00.890000Z",
"file_hash": "b9c063f912ecbcac1b3d707393c4023b40fdb0b3a0fc512dc38c375a3ec3ebce",
"private": false,
"record": {
"abstract": "We investigate parity-violating observables in the np system, including the\nlongitudinal asymmetry and neutron-spin rotation in np elastic scattering, the\nphoton asymmetry in np radiative capture, and the asymmetries in deuteron\nphoto-disintegration d(gamma,n)p in the threshold region and\nelectro-disintegration d(e,e`)np in quasi-elastic kinematics. To have an\nestimate of the model dependence for the various predictions, a number of\ndifferent, latest-generation strong-interaction potentials--Argonne v18, Bonn\n2000, and Nijmegen I--are used in combination with a weak-interaction potential\nconsisting of pi-, rho-, and omega-meson exchanges--the model known as DDH. The\ncomplete bound and scattering problems in the presence of parity-conserving,\nincluding electromagnetic, and parity-violating potentials is solved in both\nconfiguration and momentum space. The issue of electromagnetic current\nconservation is examined carefully. We find large cancellations between the\nasymmetries induced by the parity-violating interactions and those arising from\nthe associated pion-exchange currents. In the np capture, the model dependence\nis nevertheless quite small, because of constraints arising through the Siegert\nevaluation of the relevant E1 matrix elements. In quasi-elastic electron\nscattering these processes are found to be insignificant compared to the\nasymmetry produced by gamma-Z interference on individual nucleons.",
"arxiv_id": "nucl-th/0404082",
"authors": [
"R. Schiavilla",
"J. Carlson",
"M. Paris"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.70.044007",
"journal_ref": "Phys.Rev.C70:044007,2004",
"title": "Parity-Violating Interaction Effects in the np System",
"url": "https://arxiv.org/abs/nucl-th/0404082"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "139e88e0-3cad-4438-b966-812dbafb9ba3",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}