DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2005 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HK: Physik der Hadronen und Kerne

HK 34: Theorie

HK 34.9: Talk

Tuesday, March 8, 2005, 18:30–18:45, TU MA042

Nambu Goldstone modes in a modified Hartree Approximation to the O(N) Model — •Felix Riek1, Yuri Ivanov1,2, and Jörn Knoll11GSI, 64291 Darmstadt, Planckstr. 1 — 2Kurchatov Institute, Kurchatov sq. 1, Moscow 123182

We present a modified selfconsistent Hartree approximation at the example of the φ4 O(N)-model. The modification complies a) with all the desireable features of selfconsistent Dyson resummation schemes base on the 2PI functional formalism (Φ-derivable approximation) like conservation laws and thermodynamical consistency, while b) it simultaneously respects the Nambu-Goldstone theorem in the chirally broken phase. Because of these features our approach allows a scale independent renormalization of the self consistent treatment in the vacuum. However the scale dependence still persists at finite temperature leading to ambiguous results.
In this talk the temperature dependence of the masses of the pion and sigma meson will be presented together with a discussion of the resulting phase structure of the system. The results will be compared to the standard Hartree approximation.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2005 > Berlin