Chiral Effective Lagrangian Description of Bulk Nuclear Matter
نویسنده
چکیده
Here we point out that the four-nucleon terms incorporate into lowest order nonlinear chiral effective Lagrangians the same description of bulk nuclear matter contained in the Walecka model, that is generally considered satisfactory. We find this point worth noticing because, while the Walecka model is an entirely phenomenological renormalizable model, non-linear chiral Lagrangians have a deep basis in elementary particle physics, and, in this sense, are more fundamental.
منابع مشابه
Exploring the nucleus in the context of low-energy QCD
These lecture notes address a central problem of theoretical nuclear physics: how to establish a relationship between low-energy, non-perturbative QCD and nuclear phenomenology which includes both nuclear matter and finite nuclei. We develop a microscopic covariant description of nuclear many-body dynamics constrained by chiral symmetry and in-medium QCD sum rules. A relativistic pointcoupling ...
متن کاملHow reliable is the mean-field Nuclear Matter description for supporting Chiral Effective Lagrangians?
The link between non-linear chiral effective Lagrangians and the Walecka model description of bulk nuclear matter [1] is questioned. This fact is by itself due to the Mean Field Approximation (MFA) which in nuclear mater makes the picture of a nucleonnucleon interaction based on scalar(vector) meson exchange, equivalent to the description of a nuclear matter based on attractive and repulsive co...
متن کاملVacuum contributions in a chiral effective Lagrangian for nuclei.
A relativistic hadronic model for nuclear matter and finite nuclei, which incorporates nonlinear chiral symmetry and broken scale invariance, is presented and applied at the one-baryon-loop level to finite nuclei. The model contains an effective light scalar field that is responsible for the mid-range nucleon–nucleon attraction and which has anomalous scaling behavior. Oneloop vacuum contributi...
متن کاملJune 1995 From Chiral Mean Field to Walecka Mean Field And Kaon Condensation
A unified treatment of normal nuclear matter described by Walecka's mean field theory and kaon condensed matter described by chiral perturbation theory is proposed in terms of mean fields of an effective chiral Lagrangian. The BR scaling is found to play a key role in making the link between the ground state properties of nuclear matter and the fluctuation into the strangeness-flavor direction....
متن کامل0 30 70 69 v 3 4 M ay 2 00 4 Relativistic nuclear model with point - couplings constrained by QCD and chiral symmetry ⋆
We derive a microscopic relativistic point-coupling model of nuclear many-body dynamics constrained by in-mediumQCD sum rules and chiral symmetry. The effective Lagrangian is characterized by density dependent coupling strengths, determined by chiral oneand two-pion exchange and by QCD sum rule constraints for the large isoscalar nucleon self-energies that arise through changes of the quark con...
متن کامل