11 citations · 33 across the 5 of their papers we have counts for
5 papers
Quantum general covariance
Christian Gaß, José M. Gracia-Bondía, Karl-Henning Rehren
The structure of quantum interactions with fields of helicity two ("gravitons") is strongly constrained by three principles: positivity (Hilbert space), covariance, and locality of…
Generalized integrals of Macdonald and Gegenbauer functions
Jan Dereziński, Christian Gaß, Błażej Ruba
We compute bilinear integrals involving Macdonald and Gegenbauer functions. These integrals are convergent only for a limited range of parameters. However, when one uses generalize…
On the spacetime structure of infrared divergencies in QED
Christian Gaß, Karl-Henning Rehren, Felix Tippner
We investigate analytic properties of string-integrated correlation functions and propagators with emphasis on their infrared behaviour. These are relevant in various models of qua…
Revisiting the Okubo-Marshak argument
Christian Gaß, José M. Gracia-Bondía, Jens Mund
Modular localization and the theory of string-localized fields have revolutionized several key aspects of quantum field theory. They reinforce the contention that local symmetry em…
Renormalization in string-localized field theories: a microlocal analysis
Christian Gaß
Using methods of microlocal analysis, we prove that the regularization of divergent amplitudes stays a pure ultraviolet problem in string-localized field theories, despite the weak…