Report series ISSN 0284-2769 of THE SVEDBERG LABORATORY and DEPARTMENT OF RADIATION SCIENCES UPPSALA UNIVERSITY Box 533, S-75121 Uppsala, Sweden

TSL/ISV-99-0222
October 1999

Soft Colour Interactions in Non-perturbative QCD¹

G. Ingelman^a,b, A. Edin^a,b, R. Enberg^a, J. Rathsman^c, N. Timneanu^c

^a Department of Radiation Sciences, Uppsala University, Box 535, S-75121 Uppsala, Sweden
^b Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22603 Hamburg, Germany
^cStanford Linear Accelarator Center SLAC, PO Box 4349, Stanford, California 94309, USA

Abstract: Improved understanding of non-perturbative QCD dynamics can be obtained in terms of soft colour exchange models. Their essence is the variation of colour string-field topologies giving a unified description of final states in high energy interactions. In particular, both events with and without large rapidity gaps are obtained in agreement with data from ep at HERA and ppbar at the Tevatron, where also the surprisingly large production rate of high-p_T charmonium and bottomonium is reproduced.

¹Contribution to PANIC 99 confernence proceedings