Theory

The theory group studies the strong interaction at low and medium energies. The activities focus on the theoretical interpretation of the experiments at MAMI and at other accelerator facilities. Beside analytical methods like effective field theories and dispersion theory numerical simulations of Quantum Chromodynamics on the lattice are applied.

Research Topics

Hadron structure and meson production:
The basic observables for the understanding of the structure of the nucleon and its excited states are form factors, structure functions and parton distributions. The theoretical study of these observables are the basis for the interpretation of the experiments at MAMI, JLab, COMPASS as well as for future projects like PANDA.

Flavour Physics:
The calculation of weak hadronic matrix elements with lattice QCD is a central component for the determination of the elements of the CKM-matrix and CP violation in the Standard Model.

QCD at finite temperature and density:
Experimental studies made to assess where our theoretical understanding of nature has its limits and where possibly so far unobserved new worlds of matter are waiting to be discovered and understood are complemented by calculations in lattice QCD.

Group members

Professors:
Univ.-Prof. Dr. R. Brockmann, JProf. Dr. H. Meyer,
apl.-Prof. Dr. St. Scherer, Univ.-Prof. Dr. M. Vanderhaeghen,
Univ.-Prof. Dr. H. Wittig

Scientific staff:
Dr. V. Pascalutsa, Dr. L. Tiator

Postdocs:
Dr. St. Capitani, Dr. M. della Morte, Dr. J. Gegelia,
Dr. T. Ledwig, Dr. C. Lorcé, Dr. N. Kivel,
Dr. C. Miao, Dr. G. von Hippel

PhD students:
T. Bauer, T. Beranek, B. Brandt, S. Gorini, J. Guttmann,
M. Hilt, B. Jäger, B. Knippschild, B. Walk, J. Weber

Diploma students:
D. Bernecker, V. Gülpers, A. Neiser