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URN: urn:nbn:de:hebis:26-opus-47361
URL: http://geb.uni-giessen.de/geb/volltexte/2007/4736/


Covariant density functional theory for nuclear matter

Kovariant Dichtfunktionaltheorie für Kernmaterie

Badarch, Urnaa


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Freie Schlagwörter (Deutsch): mikroskopische Wechselwirkung , symmetrischer und asymmetrischer Kernmaterie , Zustandsgleichung , DDRH
Freie Schlagwörter (Englisch): microscopic interaction , symmetric and asymmetric nuclear matter , EOS , DDRH
Universität Justus-Liebig-Universität Gießen
Institut: Institut für Theoretische Physik
Fachgebiet: Physik
DDC-Sachgruppe: Physik
Dokumentart: Dissertation
Sprache: Englisch
Tag der mündlichen Prüfung: 14.06.2007
Erstellungsjahr: 2007
Publikationsdatum: 27.06.2007
Kurzfassung auf Englisch: The EOS of nuclear matter is studied in the framework of
relativistic density dependent hadron field theory (DDRH) and
results are compared to the results of the phenomenological density
dependent approach DD-ME1 which is devised to fit the
properties of the symmetric nuclear matter around the normal nuclear
matter density .

Nuclear interactions were described by a covariant density functional theory using baryons and mesons. In this work medium dependent modifications of the nuclear interactions
are taken into account with density dependent meson-baryon vertices
with momentum corrections. We showed that Lorentz invariance of the
Lagrangian, the covariance of the field equations and
thermodynamical consistency require a formulation in terms of vertex
functionals depending themselves on the field operators. The
relation of the DDRH vertex functionals to DB in-medium interactions
are discussed.

Using relativistic mean-field approximation in DDRH, we have calculated the following properties of symmetric and asymmetric nuclear matter and pure neutron matter: energy density,
pressure, binding energy, symmetry energy, effective nucleon mass,
compressibility and speed of sound in nuclear medium as functions of
the density and of the nuclear asymmetry parameter.