Elisabeth Kraus

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  • A. A. Bichl, J. M. Grimstrup, +4 authors R. Wulkenhaar
  • 2001
For the noncommutative Yang-Mills field there exist two representations (primitive and covariant) of the (undeformed) group of rigid translations, rotations and dilatations. The Seiberg-Witten map is the equivalence between both representations on the level of classical noncommutative field theories. In the covari-ant representation the Yang-Mills field is(More)
1) The specificity of proteinase K towards amino acid and oligopeptide nitroanilide substrates is investigated. 2) The active center of the enzyme contains an extended binding region consisting of several subsites. An integral part of the S1-subsite are hydrophobic areas which were investigated by systematic elongation of the carbon skeleton in carboxylic(More)
For supersymmetric gauge theories a consistent regularization scheme that preserves supersymmetry and gauge invariance is not known. In this article we tackle this problem for supersymmetric QED within the framework of algebraic renormalization. For practical calculations, a non-invariant regularization scheme may be used together with counterterms from all(More)
The renormalization of the Minimal Supersymmetric Standard Model (MSSM) is presented. We describe symmetry identities that constitute a framework in which the MSSM is completely characterized and renormalizability can be proven. Furthermore, we discuss applications of this framework for the determination of symmetry-restoring counterterms, the gauge(More)
Supersymmetric Yang-Mills-theories with local gauge coupling have a new type of anomalous breaking, which appears as a breaking of supersymme-try in the Wess-Zumino gauge. The anomalous breaking generates the two-loop order of the gauge β-function in terms of the one-loop β-function and the anomaly coefficient. We determine the anomaly coefficient in the(More)
Supersymmetric pure Yang-Mills theory is formulated with a local, i.e. space-time dependent , complex coupling in superspace. Super-Yang-Mills theories with local coupling have an anomaly, which has been first investigated in the Wess-Zumino gauge and there identified as an anomaly of supersymmetry. In a manifest supersymmetric formulation the anomaly(More)
Short-chain carboxylic acids (SCCA) are metabolic by-products of bacterial pathogens which can alter cytoplasmic pH and inhibit a variety of polymorphonuclear leukocyte (PMN) motile functions. Since cytoskeletal F-actin alterations are central to PMN mobility, in this study we examined the effects of SCCA on cytoskeletal F-actin. Initially, we tested nine(More)
By using the enlarged BRS transformations we control the gauge parameter dependence of Green functions in the background field gauge. We show that it is unavoidable – also if we consider the local Ward identity – to introduce the normalization gauge parameter ξ o , which enters the Green functions of higher orders similarly to the normalization point κ. The(More)
In this letter we apply the methods of our previous paper hep-th/0108045 to noncommutative fermions. We show that the fermions form a spin-1 2 representation of the Lorentz algebra. The covariant splitting of the conformal transformations into a field-dependent part and a θ-part implies the Seiberg-Witten differential equations for the fermions.