Angular Intermittency in QCD Jets

Details Angular Intermittency in QCD Jets Angular Intermittency in QCD Jets

1993-02-11

arxiv.org/abs/hep-ph/9302249v1

Z.Phys.C62:649-658,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

Saclay-t93/011

Scientific paper

10.1007/BF01574168

Using two methods, via fluctuations and correlations, an analytical formula is derived for the factorial multiplicity moments in a QCD jet at the Double Leading Logarithm accuracy. The resulting self-similar dependence on the solid-angle cell size is characteristic of an intermittency behaviour in angular variables. The intermittency indices depend on the diffusion angle through the running of $ \alpha_ s. $ Physical features of jet fluctuations such as collimation at large angles and saturation at small angles are well described in the perturbative framework. A parameter-free prediction of angular intermittency is proposed for $ {\cal Z}^0 $ decays into hadrons, assuming hadron-parton duality.

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