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9 papers · 2 filters
Off-Shell Dynamics of the O(3) Nonlinear Sigma-Model -- Beyond Monte-Carlo and Perturbation Theory
J. Balog, M. Niedermaier
The off-shell dynamics of the O(3) nonlinear sigma-model is probed in terms of spectral densities and two-point functions by means of the form factor approach. The exact form facto…
The Coupling Constants and Masses of the Standard Model as Symmetry Normalizations
Heinrich Saller
The numerical input for the quantitative consequences of the electroweak standard model, the hypercharge and isospin coupling constants and the Higgs field ground state mass value,…
Generalized string compactifications with spontaneously broken supersymmetry
Hans-Peter Nilles, Michal Spalinski
The Narain lattice construction of string compactifications is generalized to include spontaneously broken supersymmetry. Consistency conditions from modular invariance and Lorentz…
A q-Deformation of the Harmonic Oscillator
A. Lorek, A. Ruffing, J. Wess
The q-deformed harmonic oscillator is studied in the light of q-deformed phase space variables. This allows a formulation of the corresponding Hamiltonian in terms of the ordinary…
Perturbative versus Non-perturbative QFT -- Lessons from the O(3) NLS Model
J. Balog, M. Niedermaier, T. Hauer
The two-point functions of the energy-momentum tensor and the Noether current are used to probe the O(3) nonlinear sigma model in an energy range below 10^4 in units of the mass ga…
Operational Discrete Symmetries and CP-Violation
Martin Haft, Heinrich Saller
The discrete symmetries of the Lorentz group are on the one hand a `complex' interplay between linear and anti-linear operations on spinor fields and on the other hand simple linea…