HAL : in2p3-00003398, version 1
 arXiv : nucl-th/9801020
 Nuclear Physics A 637 (1998) 421-432
 Chiral Symmetry Restoration in nuclei and Parity Mixing
 (1998)
 We derive the expressions of the vector and axial current from a chiral Lagrangian restricted to nucleons and pions. They display mixing terms between the axial and vector currents. We study how the modification of the quark condensate affects the coupling constants of the axial cur- rent, namely the pion decay constant and the nucleonic axial one. In the second case and in a dense medium, we express the renormalization as a meson exchange current. By doing so we show what part of the scalar density of the quarks contributes to the renormalization. We give an estimate for the quenching of the axial coupling constant linked to chiral symmetry restoration.
 équipe(s) de recherche : Théorie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/nucl-th/9801020
 in2p3-00003398, version 1 http://hal.in2p3.fr/in2p3-00003398 oai:hal.in2p3.fr:in2p3-00003398 Contributeur : Sylvie Florès <> Soumis le : Mardi 3 Novembre 1998, 15:07:32 Dernière modification le : Mardi 3 Novembre 1998, 15:07:32