QCD Description of Particle Spectra up to LEP-1.5 Energies and the Running of $α_s$

Details QCD Description of Particle Spectra up to LEP-1.5 Energies and the Running of $α_s$ QCD Description of Particle Spectra up to LEP-1.5 Energies and the Running of $α_s$

1996-10-17

arxiv.org/abs/hep-ph/9610392v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 6 pages, 3 figures, uses stwol.sty and epsfig.sty, to appear in the Proc. of the 28th International Conference on High

Scientific paper

Recent results on the energy spectra in QCD jets are reported. Within the Modified Leading Logarithmic Approximation (MLLA) and the Local Parton Hadron Duality (LPHD) model one finds a very good description of the $e^+e^-$ data from the lowest up to the LEP 1.5 energies. A model with fixed $\alpha_s$ can be excluded, already in certain finite energy intervals. The fits also extrapolate smoothly into the region of small particle energies, in particular, the data follow a scaling prediction for the low energy limit derived from the colour coherence of the soft gluon emission.

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