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Optimized δ expansion for relativistic nuclear models

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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.

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Authors and Affiliations

  1. Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany, , , , , , DE

    G. Krein

  2. Departamento de Física, Universidade Federal de Santa Catarina, 88.040-900 Florianópolis, S.C., Brazil, , , , , , BR

    R.S. Marques de Carvalho, D.P. Menezes & M.B. Pinto

  3. Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 5389-970 São Paulo, S.P., Brazil, , , , , , BR

    M. Nielsen

Authors
  1. G. Krein
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  2. R.S. Marques de Carvalho
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  3. D.P. Menezes
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  4. M. Nielsen
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  5. M.B. Pinto
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Received: 17 March 1997 / Revised version: 27 August 1997

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Krein, G., Marques de Carvalho, R., Menezes, D. et al. Optimized δ expansion for relativistic nuclear models . EPJ A 1, 45–53 (1998). https://doi.org/10.1007/s100500050030

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  • DOI: https://doi.org/10.1007/s100500050030

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