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1994
Journal Article
Titel
Poincare-covariant particle dynamics. II. Fragmentation for ultrarelativistic reactions
Abstract
We present a Poincare-covariant model for ultrarelativistic particle reactions without any field degrees of freedom. Relativistic two-particle interaction is made possible by an enlargement of phase space and a distinction between physical and canonical particle coordinates. A Hamiltonian formalism with a masslike quasipotential defines the dynamics of the system. Then interaction-at-a-distance causes a change of effective particle masses instead of energy. Particle production is incorporated by a phenomenological decay procedure for the constituents (partons) in a manner analogous to a string fragmentation mechanism. This pure particle picture for Poincare-covariant collision dynamics (PCD model) is compared to other microscopic models and tested by simulations of e+e- jet events. Before application to more complex scenarios like ultrarelativistic heavy ion collisions, hard gluonic effects should be included. In the PCD model, this can be done by introduction of massive gluons as part icles