77 citations · 268 across the 15 of their papers we have counts for
10 papers · 1 filter
Higgs mechanism and renormalization group flow: are they compatible?
Michael Duetsch
Usually the Lagrangian of a model for massive vector bosons is derived in a geometric way by the Higgs mechanism. We investigate whether this geometric structure is maintained unde…
Massive vector bosons: is the geometrical interpretation as a spontaneously broken gauge theory possible at all scales?
Michael Duetsch
The usual derivation of the Lagrangian of a model for massive vector bosons, by spontaneous symmetry breaking of a gauge theory, implies that the prefactors of the various interact…
Dimensional Regularization in Position Space, and a Forest Formula for Epstein-Glaser Renormalization
Michael Duetsch, Klaus Fredenhagen, Kai Johannes Keller +1
We reformulate dimensional regularization as a regularization method in position space and show that it can be used to give a closed expression for the renormalized time-ordered pr…
On the assertion that PCT violation implies Lorentz non-invariance
Michael Duetsch, Jose M. Gracia-Bondia
Out of conviction or expediency, some current research programs take for granted that "PCT violation implies violation of Lorentz invariance". We point out that this claim is still…
Protecting the conformal symmetry via bulk renormalization on Anti deSitter space
Michael Duetsch, Karl-Henning Rehren
The problem of perturbative breakdown of conformal symmetry can be avoided, if a conformally covariant quantum field phi on d-dimensional Minkowski spacetime is viewed as the bound…
Quantum gauge models without classical Higgs mechanism
Michael Duetsch, Jose M. Gracia-Bondia, Florian Scheck +1
We examine the status of massive gauge theories, such as those usually obtained by spontaneous symmetry breakdown, from the viewpoint of causal (Epstein-Glaser) renormalization. Th…
The Quantum Action Principle in the framework of Causal Perturbation Theory
Ferdinand Brennecke, Michael Duetsch
In perturbative quantum field theory the maintenance of classical symmetries is quite often investigated by means of algebraic renormalization, which is based on the Quantum Action…
The Master Ward Identity
M. Duetsch, F. -M. Boas
In the framework of perturbative quantum field theory (QFT) we propose a new, universal (re)normalization condition (called 'master Ward identity') which expresses the symmetries o…
Slavnov-Taylor Identities from the Causal Point of View
Michael Duetsch
We continue the investigation of quantized Yang-Mills theories coupled to matter fields in the framework of causal perturbation theory which goes back to Epstein and Glaser. In thi…
Non-Uniqueness of Quantized Yang-Mills Theories
Michael Duetsch
We consider quantized Yang-Mills theories in the framework of causal perturbation theory which goes back to Epstein and Glaser. In this approach gauge invariance is expressed by a…