Effects of Dirac sea polarization on hadronic properties : a Chiral SU(3) approach

Abstract: The e ect of vacuum fluctuations on the in-medium hadronic properties is investigated using a chiral SU(3) model in the nonlinear realization. The e ect of the baryon Dirac sea is seen to modify hadronic proper
Abstract: The e ect of vacuum fluctuations on the in-medium hadronic properties is investigated using a chiral SU(3) model in the nonlinear realization. The e ect of the baryon Dirac sea is seen to modify hadronic properties and in contrast to a calculation in mean field approximation it is seen to give rise to a significant drop of the vector meson masses in hot and dense matter. This e ect is taken into account through the summation of baryonic tadpole diagrams in the relativistic Hartree approximation (RHA), where the baryon self energy is modified due to interactions with both the non-strange ( ) and the strange ( ) scalar fields.
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Metadaten
Author:Amruta Mishra, K. Balazs, Detlef Zschiesche, Stefan Schramm, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-20832
Document Type:Preprint
Language:English
Date of Publication (online):2005/11/10
Year of first Publication:2003
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/11/10
Tag:Dirac ; baryon; heiße und dichte Materie ; meson
Dirac ; baryon; hot and dense matter ; meson
Source:Phys.Rev.C69:024903,2004. [nucl-th/0308064]
HeBIS PPN:188893040
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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