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- I C Cloët, A Krassnigg, C D Roberts
- 2008

We provide a snapshot of Dyson-Schwinger equation applications to the theory and phenomenology of hadrons. Exact results for pseudoscalar mesons are highlighted, with details relating to the U A (1) problem. Calculated masses of the lightest J = 0, 1 states are discussed. We recapitulate upon studies of nucleon properties and give a perspective on the… (More)

Dyson-Schwinger equations furnish a Poincaré covariant approach to hadron physics. They reveal that dynamical chiral symmetry breaking is tied to the long-range behaviour of the strong interaction and make predictions corroborated by modern lattice-QCD simulations. A hallmark in the contemporary use of DSEs is the existence of a nonperturbative, symmetry… (More)

- M. Blank, A. Krassnigg
- Computer Physics Communications
- 2011

- A Höll, A Krassnigg, C D Roberts
- 2004

Aspects of the dressed-quark-gluon vertex and their role in the gap and Bethe-Salpeter equations are briefly surveyed using an intuitive model. The model allows one to elucidate why a linear extrapolation to the chiral limit of extant lattice data on the dressed-quark mass-function overestimates this function and hence the value of the vacuum quark… (More)

- A Höll, R Alkofer, M Kloker, A Krassnigg, C D Roberts, S V Wright
- 2005

Electron scattering at large Q 2 probes a nucleon's quark core. This core's contribution to electromagnetic form factors may be calculated using Poincaré covariant Faddeev amplitudes combined with a nucleon-photon vertex that automatically fulfills a Ward-Takahashi identity for on-shell nucleons. The calculated behaviour of G

- A H Oll, A Krassnigg, C D Roberts, S V Wright
- 2004

A strongly momentum-dependent dressed-quark mass function is basic to QCD. It is central to the appearance of a constituent-quark mass-scale and an existential prerequisite for Goldstone modes. Dyson-Schwinger equation (DSEs) studies have long emphasised this importance, and have proved that QCD's Goldstone modes are the only pseudoscalar mesons to possess… (More)

- A. Krassnigg
- 2001

Starting from a one–body front–form equation with Lepage-Brodsky spinors we show, with a fair amount of new technology, how an integral equation in standard momentum space with Bjørken-Drell spinors can be obtained. The integral equation decouples for singlets and triplets.

- G Eichmann, R Alkofer, A Krassnigg, D Nicmorus
- Physical review letters
- 2010

We report the first study of the nucleon where the full Poincaré-covariant structure of the three-quark amplitude is implemented in the Faddeev equation. We employ an interaction kernel which is consistent with contemporary studies of meson properties and aspects of chiral symmetry and its dynamical breaking, thus yielding a comprehensive approach to hadron… (More)

- Dietmar Rakowitz, Barbara Matuszczak, Stefan Gritsch, Peter Hofbauer, Andreas Krassnigg, Luca Costantino
- European journal of pharmaceutical sciences…
- 2002

Diphenylmethyleneaminooxycarboxylic acids were found to represent novel type inhibitors of the enzyme aldose reductase. Ester derivatives of the most active compound (3c) (IC(50)=33 microM) were prepared as potential prodrugs and the rate of degradation was studied by treatment with buffers, plasma, and various hydrolytic enzymes. Whereas all compounds were… (More)

We examine the nucleon's electromagnetic form factors in a Poincaré-covariant Faddeev framework. The three-quark core contributions to the form factors are obtained by employing a quark-diquark approximation. We implement the self-consistent solution for the quark-photon vertex from its inhomogeneous Bethe-Salpeter equation. We find that the resulting… (More)