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Optimized δ expansion for relativistic nuclear models |
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| Authors: | G. Krein R.S. Marques de Carvalho D.P. Menezes M. Nielsen M.B. Pinto |
| Affiliation: | Institut für Kernphysik, Universit?t Mainz, D-55099 Mainz, Germany, DE Departamento de Física, Universidade Federal de Santa Catarina, 88.040-900 Florianópolis, S.C., Brazil, BR Instituto de Física, Universidade de S?o Paulo, Caixa Postal 66318, 5389-970 S?o Paulo, S.P., Brazil, BR |
| Abstract: | The optimized δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. This technique is discussed in the λφ4 model and then implemented in the Walecka model for the equation of state of nuclear matter. The results obtained with the δ expansion are compared with those obtained with the traditional mean field, relativistic Hartree and Hartree-Fock approximations. Received: 17 March 1997 / Revised version: 27 August 1997 |
| Keywords: | PACS:21.60.-n Nuclear structure models and methods – 21.65.+f Nuclear matter – 12.38.Lg Other nonperturbative calculations |
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