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8 papers · 1 filter
Scattering phases in the broken phase of the 4-d O(4) non-linear sigma-model
J. Westphalen, F. Zimmermann, M. Goeckeler +1
Using Luescher's method we determine the elastic scattering phases in the broken phase of the 4-dimensional O(4) non-linear sigma-model from the two-particle energy spectrum in a M…
Three-point functions in noncompact lattice QED
M. Goeckeler, R. Horsley, P. E. L. Rakow +1
We calculate fermion-antifermion-"meson" three-point functions in noncompact lattice QED with dynamical staggered fermions and use them to extract effective Yukawa couplings. The r…
Tracing CP violation in the production of top quark pairs by multiple TeV proton-proton collisions
W. Bernreuther, A. Brandenburg
We investigate the possibilities of searching for non-standard CP violation in at multiple TeV collision energies. A general kinematic analysis of the underlying…
Universality of 2d Yukawa and Gross-Neveu models
E. Focht
Evidence for the same universal behavior of 2d Yukawa and Gross-Neveu models in a certain range of couplings, particularly for , is presented.
On the solution of the initial value constraints for general relativity coupled to matter in terms of Ashtekar's variables
T. Thiemann
The method of solution of the initial value constraints for pure canonical gravity in terms of Ashtekar's new canonical variables due to CDJ is further developed in the present pap…
Canonical Quantization of Spherically Symmetric Gravity in Ashtekar's Self-Dual Representation
T. Thiemann, H. A. Kastrup
We show that the quantization of spherically symmetric pure gravity can be carried out completely in the framework of Ashtekar's self-dual representation. Consistent operator order…