dorsal/arxiv
View SchemaParity Violating Measurements of Neutron Densities
| Authors | C. J. Horowitz, S. J. Pollock, P. A. Souder, R. Michaels |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9912038 |
| URL | https://arxiv.org/abs/nucl-th/9912038 |
| DOI | 10.1103/PhysRevC.63.025501 |
| Journal | Phys.Rev.C63:025501,2001 |
Abstract
Parity violating electron nucleus scattering is a clean and powerful tool for measuring the spatial distributions of neutrons in nuclei with unprecedented accuracy. Parity violation arises from the interference of electromagnetic and weak neutral amplitudes, and the $Z^0$ of the Standard Model couples primarily to neutrons at low $Q^2$. The data can be interpreted with as much confidence as electromagnetic scattering. After briefly reviewing the present theoretical and experimental knowledge of neutron densities, we discuss possible parity violation measurements, their theoretical interpretation, and applications. The experiments are feasible at existing facilities. We show that theoretical corrections are either small or well understood, which makes the interpretation clean. The quantitative relationship to atomic parity nonconservation observables is examined, and we show that the electron scattering asymmetries can be directly applied to atomic PNC because the observables have approximately the same dependence on nuclear shape.
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"abstract": "Parity violating electron nucleus scattering is a clean and powerful tool for\nmeasuring the spatial distributions of neutrons in nuclei with unprecedented\naccuracy. Parity violation arises from the interference of electromagnetic and\nweak neutral amplitudes, and the $Z^0$ of the Standard Model couples primarily\nto neutrons at low $Q^2$. The data can be interpreted with as much confidence\nas electromagnetic scattering. After briefly reviewing the present theoretical\nand experimental knowledge of neutron densities, we discuss possible parity\nviolation measurements, their theoretical interpretation, and applications. The\nexperiments are feasible at existing facilities. We show that theoretical\ncorrections are either small or well understood, which makes the interpretation\nclean. The quantitative relationship to atomic parity nonconservation\nobservables is examined, and we show that the electron scattering asymmetries\ncan be directly applied to atomic PNC because the observables have\napproximately the same dependence on nuclear shape.",
"arxiv_id": "nucl-th/9912038",
"authors": [
"C. J. Horowitz",
"S. J. Pollock",
"P. A. Souder",
"R. Michaels"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex",
"physics.atom-ph"
],
"doi": "10.1103/PhysRevC.63.025501",
"journal_ref": "Phys.Rev.C63:025501,2001",
"title": "Parity Violating Measurements of Neutron Densities",
"url": "https://arxiv.org/abs/nucl-th/9912038"
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