4 papers
Analytic calculation of the 1-loop effective action for the O(N+1)-symmetric 2-dimensional nonlinear sigma-model
M. Bartels, G. Mack, G. Palma
Polyakov's calculation of the effective action for the 2d nonlinear sigma-Model is generalized by purely analytic means to include contributions which are not UV-divergent and whic…
Self-consistent Calculation of Real Space Renormalization Group Flows and Effective Potentials
M. Griessl, G. Mack, G. Palma +1
We show how to compute real space renormalization group flows in lattice field theory by a self-consistent method. In each step, the integration over the fluctuation field (high fr…
Perfect 3-Dimensional Lattice Actions for 4-Dimensional Quantum Field Theories at Finite Temperature
U. Kerres, G. Mack, G. Palma
We propose a two-step procedure to study the order of phase transitions at finite temperature in electroweak theory and in simplified models thereof. In a first step a coarse grain…
A Self Consistent Study of the Phase Transition in the Scalar Electroweak Theory at Finite Temperature
U. Kerres, G. Mack, G. Palma
We propose the study of the phase transition in the scalar electroweak theory at finite temperature by a two - step method. It combines i) dimensional reduction to a 3-dimensional…