Correlations in multiparticle production

University dissertation from Sölvegatan 14 A, 223 62 Lund, Sweden

Author: Markus Ringnér; Lunds Universitet.; Lund University.; [1998]

Keywords: NATURVETENSKAP; NATURAL SCIENCES; klassisk mekanik kvantmekanik String fragmentation QCD Correlations Colour interference Bose-Einstein interference quantum mechanics classical mechanics Mathematical and general theoretical physics relativity gravitation statistical physics Matematisk och allmän teoretisk fysik thermodynamics High energy interactions termodynamik cosmic rays Kosmisk strålning högenergi statistisk fysik gravitation relativitet;

Abstract: Different aspects of the strong interaction in particle collisions are studied. Most of the work is based on the Lund string fragmentation model for hadron production. A model which incorporates interference between identical bosons in the string model is presented. With this model the consequences for the Bose-Einstein effect are investigated in detail. What happens at the end of the QCD cascades is also addressed. It is shown that, with just a few reasonable assumptions, the emission of soft gluons is constrained to produce an ordered field in the form of a helix. A signature of the helix field which should survive fragmentation is presented. Inspired by the Feynman-Wilson gas analogy a partition function for the string model is derived and its properties are investigated.

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