Soft Limits of Multiparticle Observables and Parton Hadron Duality

Details Soft Limits of Multiparticle Observables and Parton Hadron Duality Soft Limits of Multiparticle Observables and Parton Hadron Duality

1999-10-13

arxiv.org/abs/hep-ph/9910319v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

talk at Ringberg workshop "New trends in HERA physics 1999", Tegernsee, May 1999; LaTeX, 13 pages, 6 Figs

Scientific paper

We discuss observables in multiparticle production for three kinds of limits of decreasing kinematical scales: 1. the transition jet \to hadron (limit y_{cut}\to 0 of the resolution parameter y_{cut}); 2. single particle inclusive distributions normalized at threshold \sqrt s\to 0 and 3. particle densities in the limit of low momentum p,p_T\to 0. The observables show a smooth behaviour in these limits and follow the perturbative QCD predictions, originally designed for large scales, whereby a simple prescription is supplemented to take into account mass effects. A corresponding physical picture is described.

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