dorsal/arxiv
View SchemaIn-Medium Effective Axial-Vector Coupling Constant
| Authors | Tae-Sun Park, Hong Jung, Dong-Pil Min |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9704033 |
| URL | https://arxiv.org/abs/nucl-th/9704033 |
| DOI | 10.1016/S0370-2693(97)00880-0 |
| Journal | Phys.Lett. B409 (1997) 26-32 |
Abstract
The axial-vector coupling constant in nuclear medium is systematically studied using chiral perturbation theory. For normal nuclear matter, the first non-trivial corrections are estimated based on the independent particle approximation taking into account nuclear correlations in nuclear medium. The one-pion-exchange (OPE) two-body interactions turn out to enhance the coupling constant by $\delta g_A/g_A\simeq (0.09 \sim 0.15)$. The role of the four-nucleon contact interaction, whose low-energy constants are yet to be determined, is analyzed in connection with the empirical quenching factor of $\delta g_A/g_A\simeq -0.2$ in the presence of the nuclear short-range correlation. Conventional approaches are discussed in the light of our result.
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"abstract": "The axial-vector coupling constant in nuclear medium is systematically\nstudied using chiral perturbation theory. For normal nuclear matter, the first\nnon-trivial corrections are estimated based on the independent particle\napproximation taking into account nuclear correlations in nuclear medium. The\none-pion-exchange (OPE) two-body interactions turn out to enhance the coupling\nconstant by $\\delta g_A/g_A\\simeq (0.09 \\sim 0.15)$. The role of the\nfour-nucleon contact interaction, whose low-energy constants are yet to be\ndetermined, is analyzed in connection with the empirical quenching factor of\n$\\delta g_A/g_A\\simeq -0.2$ in the presence of the nuclear short-range\ncorrelation. Conventional approaches are discussed in the light of our result.",
"arxiv_id": "nucl-th/9704033",
"authors": [
"Tae-Sun Park",
"Hong Jung",
"Dong-Pil Min"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0370-2693(97)00880-0",
"journal_ref": "Phys.Lett. B409 (1997) 26-32",
"title": "In-Medium Effective Axial-Vector Coupling Constant",
"url": "https://arxiv.org/abs/nucl-th/9704033"
},
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