dorsal/arxiv
View SchemaOptimized $\delta$ expansion for the Walecka model
| Authors | G. Krein, D. P. Menezes, M. B. Pinto |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9510059 |
| URL | https://arxiv.org/abs/nucl-th/9510059 |
| DOI | 10.1016/0370-2693(95)01578-7 |
| Journal | Phys.Lett. B370 (1996) 5-11 |
Abstract
The optimized $\delta$-expansion is used to study vacuum polarization effects in the Walecka model. The optimized $\delta$-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Vacuum effects on self-energies and the energy density of nuclear matter are studied up to ${\cal O}(\delta^2)$. When exchange diagrams are neglected, the traditional Relativistic Hartree Approximation (RHA) results are exactly reproduced and, using the same set of parameters that saturate nuclear matter in the RHA, a new stable, tightly bound state at high density is found.
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"abstract": "The optimized $\\delta$-expansion is used to study vacuum polarization effects\nin the Walecka model. The optimized $\\delta$-expansion is a nonperturbative\napproach for field theoretic models which combines the techniques of\nperturbation theory and the variational principle. Vacuum effects on\nself-energies and the energy density of nuclear matter are studied up to ${\\cal\nO}(\\delta^2)$. When exchange diagrams are neglected, the traditional\nRelativistic Hartree Approximation (RHA) results are exactly reproduced and,\nusing the same set of parameters that saturate nuclear matter in the RHA, a new\nstable, tightly bound state at high density is found.",
"arxiv_id": "nucl-th/9510059",
"authors": [
"G. Krein",
"D. P. Menezes",
"M. B. Pinto"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/0370-2693(95)01578-7",
"journal_ref": "Phys.Lett. B370 (1996) 5-11",
"title": "Optimized $\\delta$ expansion for the Walecka model",
"url": "https://arxiv.org/abs/nucl-th/9510059"
},
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