16 citations · 34 across the 3 of their papers we have counts for
7 papers
Photoabsorption off nuclei with self consistent vertex corrections
F. Riek, M. F. M. Lutz, C. L. Korpa
We study photoproduction off nuclei based on a self consistent and covariant many body approach for the pion and isobar propagation in infinite nuclear matter. For the first time t…
Covariant and self consistent vertex corrections for pions and isobars in nuclear matter
C. L. Korpa, M. F. M. Lutz, F. Riek
We evaluate the pion and isobar propagators in cold nuclear matter self consistently applying a covariant form of the isobar-hole model. Migdal's vertex correction effects are cons…
Comment on: Non-perturbative finite T broadening of the rho meson and dilepton emission in heavy ion-collisions (by J. Ruppert and T. Renk Phys. Rev. C71 (2005) 064903; nucl-th/0412047
Felix Riek, Hendrik van Hees, Jörn Knoll
In this comment we point out several problems concerning kinematical singularities which are encountered in the calculation of the dilepton rates in {Ruppert:2004yg}. We also comme…
Dynamics of Resonances in Strongly Interacting Systems
J. Knoll, F. Riek, Yu. B. Ivanov +1
The effects of the propagation of particles which have a finite life-time and an according broad distribution in their mass spectrum are discussed in the context of a transport des…
Renormalization of a gapless Hartree-Fock approximation to a theory with spontaneously broken O(N)-symmetry
Yu. B. Ivanov, F. Riek, H. van Hees +1
The renormalization of a gapless Phi-derivable Hartree--Fock approximation to the O(N)-symmetric lambda*phi^4 theory is considered in the spontaneously broken phase. This kind of a…
Gapless Hartree-Fock Resummation Scheme for the O(N) Model
Yu. B. Ivanov, F. Riek, J. Knoll
A modified selfconsistent Hartree-Fock approximation to the lambda*phi^4 theory with spontaneously broken O(N) symmetry is proposed. It preserves all the desirable features, like c…