Motivation of the Topic

Quantum Chromodynamics is in the meantime generally recognized as the correct theory to describe the strong interaction. But due to the large coupling constant for the gluon-quark coupling at low momentum transfers, it is impossible to solve QCD at low energies, where most of the experimental data are available, by perturbation theory. To describe the properties of mesons, baryons and their interactions, one has two choices. On one side one can try a purely numerical solution of QCD on a four-dimensional lattice. Part of the community is choosing this approach, which will be represented in this workshop by lectures of Andreas Schaefer, Regensburg and seminars by Tetsuo Hatsuda from the University of Tokyo. A different approach is to define effective field theories and connect them with QCD as for example in chiral perturbation theory. J. Gasser from Bern will lecture about the foundation of chiral perturbation theory, while B. Holstein from the University of Massachussetts in Amherst and U. Meissner, Jülich will speak about applications of this approach to mesons, nucleons and light nuclei. An other approach is to concentrate the important low energy degrees of freedom of QCD into relativistic (or also non-relativistic) effective Lagrangian with constituent quarks as quasi particles, which then describe effectively in quark models the properties of hadrons and their interaction.

QCD sum rules allow for example to study the density and temperature dependence of properties of particles in nuclear matter (E. Drukarev). Methods which combine perturbative methods for high momentum projectile and its interaction with a single quark and non-perturbative approaches for the structure of the target will be reviewed by K. Goeke (Bochum).

Experimental methods to determine the polarizabilities of nucleons and mesons will be presented by N. D'Hose/Saclay.

Photoproduction of baryon resonances give information about the structure of those excited baryonic states.

The international workshop on nuclear physics 2002 will be devoted to this topic under the title: ``Quarks in hadrons and nuclei''. It tries to combine the theoretical approaches for low energy approximations to QCD with the relevant data like form factors of nucleons, polarizabilities of hadrons, the spin structure of the nucleons and fundamental symmetries like CP-violation in the B-meson decay. In detail the workshop is treating the following topics:

1. Effective Lagrangians in QCD
2. Chiral perturbation theory
3. Quark models
4. Form factors and strangeness in nucleons
5. The spin structure of nucleons
6. Polarizabilities of hadrons
7. Virtual Compton scattering
8. QCD sum rules
9. Quarks in nuclei
10. CP-violation in B-meson decays
11. Reports from different laboratories

The international Workshop on nuclear Physics in Erice 2002 ``Quarks in hadrons and nuclei'' is devoted to these topics. In the lectures, seminars and afternoon workshops of the school a survey of the present status of these problems will be given. Participants including PhD students have the possibility to speak in workshops about their own contributions in these fields.

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