dorsal/arxiv
View SchemaP,T-Violating Nuclear Matrix Elements in the One-Meson Exchange Approximation
| Authors | I. S. Towner, A. C. Hayes |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9402026 |
| URL | https://arxiv.org/abs/nucl-th/9402026 |
| DOI | 10.1103/PhysRevC.49.2391 |
| Journal | Phys.Rev.C49:2391-2397,1994 |
Abstract
Expressions for the P,T-violating NN potentials are derived for $\pi$, $\rho$ and $\omega$ exchange. The nuclear matrix elements for $\rho$ and $\omega$ exchange are shown to be greatly suppressed, so that, under the assumption of comparable coupling constants, $\pi$ exchange would dominate by two orders of magnitude. The ratio of P,T-violating to P-violating matrix elements is found to remain approximately constant across the nuclear mass table, thus establishing the proportionality between time-reversal-violation and parity-violation matrix elements. The calculated values of this ratio suggest a need to obtain an accuracy of order $ 5 \times 10^{-4}$ for the ratio of the PT-violating to P-violating asymmetries in neutron transmission experiments in order to improve on the present limits on the isovector pion coupling constant.
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"abstract": "Expressions for the P,T-violating NN potentials are derived for $\\pi$, $\\rho$\nand $\\omega$ exchange. The nuclear matrix elements for $\\rho$ and $\\omega$\nexchange are shown to be greatly suppressed, so that, under the assumption of\ncomparable coupling constants, $\\pi$ exchange would dominate by two orders of\nmagnitude. The ratio of P,T-violating to P-violating matrix elements is found\nto remain approximately constant across the nuclear mass table, thus\nestablishing the proportionality between time-reversal-violation and\nparity-violation matrix elements. The calculated values of this ratio suggest a\nneed to obtain an accuracy of order $ 5 \\times 10^{-4}$ for the ratio of the\nPT-violating to P-violating asymmetries in neutron transmission experiments in\norder to improve on the present limits on the isovector pion coupling constant.",
"arxiv_id": "nucl-th/9402026",
"authors": [
"I. S. Towner",
"A. C. Hayes"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.49.2391",
"journal_ref": "Phys.Rev.C49:2391-2397,1994",
"title": "P,T-Violating Nuclear Matrix Elements in the One-Meson Exchange Approximation",
"url": "https://arxiv.org/abs/nucl-th/9402026"
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