Soft and hard processes in QCD

Details Soft and hard processes in QCD Soft and hard processes in QCD

2005-01-21

arxiv.org/abs/hep-ph/0501203v3

JETP Lett. 81 (2005) 307-310; Pisma Zh.Eksp.Teor.Fiz. 81 (2005) 391-394

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, no Figures, LATEX, more detailed discussion of definitions and proposals for experiment is given

Scientific paper

10.1134/1.1944068

QCD equations for the generating functions are applied to separate soft and hard jets in $e^+e^-$-processes of multiparticle production. The dependence of average multiplicities and higher moments of multiplicity distributions of particles created in a "newly born" soft subjets on the share of energy devoted to them is calculated in fixed coupling gluodynamics. This dependence is the same as for the total multiplicity up to a constant factor if soft jets are defined as those carrying out a fixed share of initial energy at all energies. The constant factor depends on this share in a non-trivial way. Other definitions are also proposed. The relation between these quantities for soft and hard processes is discussed.

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