Pomeron and Odderon in Theory and Experiment

Internationales Wissenschaftsforum -- Heidelberg, Germany -- March 19-21, 1998


We thank

all the speakers and participants for the successful scientific program and for the fruitful discussions that we had in this Workshop.

The transparencies of the talks have been copied and are available on the web: Click on the appropriate entry in the following list.

List of speakers and topics (theory)

E. Berger Univ. Heidelberg Elastic Cross Section
A. Donnachie Univ. Manchester The Non-Perturbative versus the Perturbative Pomeron
T. Gousset Univ. Nantes Vector Meson Production at HERA
D. Graudenz PSI Villigen Diffractive Higgs Production at the LHC
A. Hebecker Univ. Cambridge Diffractive Structure Functions
W. Kilian Univ. Heidelberg The Odderon in ep Scattering
R. Kirschner Univ. Leipzig The Perturbative Odderon
J. Kwiecinski Univ. Krakau / Durham Eta-c Production in ep Collisions
P.V. Landshoff Univ. Cambridge What Puzzles are left?
E. Meggiolaro Univ. Heidelberg High-Energy Quark-Quark Scattering
B. Nicolescu Univ. Paris The Odderon in Regge Theory
M. Rüter Univ. Tel Aviv The Odderon in the Model of the Stochastic Vacuum

List of speakers and topics (experiment)

M. Erdmann Univ. Heidelberg Photon Structure at HERA
S.V. Levonian DESY Gamma-p Total Cross Section at HERA
L. Lindemann DESY Inclusive Measurement of F2D at HERA
G. Matthiae Univ. Roma Total Hadron-Hadron Cross Sections
P. Schlein UCLA Diffractive Final States in Hadron-Hadron Collisions
S. Söldner-Rembold Univ. Freiburg Photon-Photon Physics at LEP
S. Tapprogge CERN Pseudoscalar Production at HERA
D. Westphal DESY Vector Meson Production at HERA


The Workshop has been organized at the University of Heidelberg by the Graduiertenkollegs It consisted of invited talks (both experimental and theoretical) and informal discussions on the physics of the Pomeron and Odderon in hadronic interactions.

Physics program

The large amount of data now available from the experiments at HERA, Tevatron, and elsewhere, make it possible to study diffractive phenomena at a high level of precision in previously inaccessable energy ranges. At high energies, soft hadronic interactions are usually connected with the exchange of a color-neutral object, the pomeron. The pomeron is generally believed to be responsible for a wide variety of phenomena, such as elastic scattering, rapidity gaps, and vector meson production. In addition, a CP-odd partner of the pomeron, the odderon, has been postulated from theoretical considerations, but could not yet be established experimentally.

Despite the successes of QCD as the fundamental theory of strong interactions, a satisfactory explanation of diffractive phenomena from first principles has remained a challenge. However, the present data and the data samples expected from the forthcoming experiments at HERA, Tevatron, and LHC, will open new possibilities for studying the physics of the pomeron and odderon. Lepton collision experiments provide additional information necessary for extracting the odderon from diffractive scattering data. Together, these may help to gain a deeper understanding of these processes, eventually leading to a complete description of soft hadronic phenomena in the context of QCD.

Therefore, the aim of the Workshop is to bring together theorists and experimentalists working in the field, to review what is known presently, and, in particular, to discuss future prospects for obtaining information about the physical properties of the pomeron and odderon in high-energy reactions.


The Workshop took place at the Internationales Wissenschaftsforum in the Old Town of Heidelberg. You may also like to visit the homepages of the Theoretical Physics Institute and the Institute for High Energy Physics.


The Workshop began on Thursday, March 19, 1998 at 9:00 a.m. and ended on Saturday, March 21 at noon. Click here for the program (PostScript file).


Click here to get the list of participants (PostScript file).


Dr. W. Kilian - W.Kilian@thphys.uni-heidelberg.de
Institut für Theoretische Physik, Philosophenweg 16, D-69120 Heidelberg, Germany
Prof. K. Meier - meierk@ihep.uni-heidelberg.de
Institut für Hochenergiephysik, Schröderstraße 90, D-69120 Heidelberg, Germany
Prof. O. Nachtmann - O.Nachtmann@thphys.uni-heidelberg.de
Institut für Theoretische Physik, Philosophenweg 16, D-69120 Heidelberg, Germany

Last modified on Apr 3, 1998 by W.Kilian@thphys.uni-heidelberg.de