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Violation of Quantum Gauge Invariance in Georgi-Glashow SU(5)
Martin Ambauen, Gunter Scharf
We check whether the SU(5) model, originally suggested by Georgi and Glashow, is compatible with perturbative quantum gauge invariance in first and second order for massive asympto…
Quantum field components of supersymmetric multiplets
Florin Constantinescu, Gunter Scharf
We adress the problem of Fock space representations of (free) multiplet component fiels encountered in supersymmetric quantum field theory insisting on positivity and causality. We…
Quantized hermitian superfields
Florin Constantinescu, Markus Gut, Gunter Scharf
We analyse the algebras generated by free component quantum fields together with the susy generators . Restricting to hermitian fields we first construct the scalar field…
Causal Approach to Supersymmetry: Chiral Superfields
Florin Constantinescu, Gunter Scharf
We construct quantized free superfields and represent them as operator-valued distributions in Fock space starting with Majorana fields. The perturbative construction of the S-matr…
Power counting degree versus singular order in the Schwinger model
Andreas Aste, G"unter Scharf, Urs Walther
The importance of a rigorous definition of the singular degree of a distribution is demonstrated on the case of two-dimensional QED (Schwinger model). Correct mathematical treatmen…