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| Formato: | Artículo científico |
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Sociedade Brasileira de Física
2012
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=46423465008 |
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- Point-coupling Models from Mesonic Hypermassive Limit and Mean-field Approaches O. Lourenço M. Dutra R. L. P. G. Amaral Antonio Delfino Física, Astronomía y Matemáticas Mean Point Walecka models field approach coupling models In this work, we show how nonlinear pointcoupling models, described by a Lagrangian density containing only terms up to fourth order in the fermioncondensate ( uu), are derived from a modified mesonexchange nonlinear Walecka model. We present two methods of derivation, namely the hypermassive meson limit within a functional integral approach and the mean-field approximation, in which equations of state at zero temperature of the nonlinear point-coupling models are directly obtained. 2012 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46423465008 http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3-4 Vol.42