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- V Cirigliano, G Ecker, H Neufeld, A Pich
- 2008

We investigate the implications of large N c and chiral symmetry for the mass spectra of meson resonances. Unlike for most other mesons, the mass matrix of the light scalars deviates strongly from its large-N c limit. We discuss the possible assignments for the lightest scalar nonet that survives in the large-N c limit.

- G. Ecker
- 1997

We establish exact relations between relativistic form factors and amplitudes for single– baryon processes and the corresponding quantities calculated in the framework of heavy baryon chiral perturbation theory. A crucial ingredient for the proper matching is the first complete treatment of baryon wave function renormalization in heavy baryon chiral… (More)

- Gerhard Ecker
- 2000

After an introduction to chiral perturbation theory, the effective field theory of the standard model at low energies, a brief overview is given of applications to light-flavour physics. Three topics in the strong interactions of pseudoscalar mesons are then discussed in some detail: loops and chiral logs, pion-pion scattering and isospin violation.

- G Ecker
- 1995

After a brief introduction to chiral perturbation theory, the effective field theory of the standard model at low energies, two recent applications are reviewed: elastic pion–pion scattering to two– loop accuracy and the complete renormalized pion–nucleon Lagrangian to O(p 3) in the chiral expansion.

- Antony J Williams, Lee Harland, +8 authors Barend Mons
- Drug discovery today
- 2012

Open PHACTS is a public-private partnership between academia, publishers, small and medium sized enterprises and pharmaceutical companies. The goal of the project is to deliver and sustain an 'open pharmacological space' using and enhancing state-of-the-art semantic web standards and technologies. It is focused on practical and robust applications to solve… (More)

Dimensionality reduction and feature subset selection are two techniques for reducing the attribute space of a feature set, which is an important component of both supervised and unsupervised classification or regression problems. While in feature subset selection a subset of the original attributes is extracted, dimensionality reduction in general produces… (More)

- Khac-Minh Thai, Gerhard F Ecker
- Molecular diversity
- 2009

There is an increasing interest in computational models for the classification and prediction of the human ether-a-go-go-related-gene (hERG) potassium channel affinity in the early phase of drug discovery and development. In this study, similarity-based SIBAR descriptors were applied in order to develop and validate in silico binary QSAR and… (More)

- J Bijnens, G Colangelo, G Ecker
- 1995

The renormalization of chiral perturbation theory is carried out to next-to-next-to-leading order in the meson sector. We calculate the divergent part of the generating functional of Green functions of quark currents to O(p 6) for chiral SU(n), involving one-and two-loop diagrams. The renormaliza-tion group equations for the renormalized low-energy… (More)

- J Bijnens, G Colangelo, G Ecker, J Gasser, M E Sainio
- 1995

We evaluate analytically the elastic scattering amplitude to two loops in chiral perturbation theory and give numerical values for the two S{wave scattering lengths and for the phase shift diierence 0 0 ? 1 1 .