Abstract
We present a Monte Carlo program for event simulation of Quantum Chromodynamics ine +e− annihilation, which includes multi-emission of quanta treated in the leading-logarithm approximation. Some difficulties of currentO(α s ) phenomenology, associated with the treatment of divergences, are eliminated, without essentially altering the results of the analysis of the data from PETRA. At the same time a direct extension is provided of current QCD phenomenology to LEP energies, where multi-emission effects cannot be ignored. Detailed predictions for hadrons within the LEP energy interval are reported. With respect to conventionalO(α s ) calculations, some new predicted features are: i) an average hadron multiplicity rising faster than logW, whereW is the c.m. energy, ii) a slower increase of the average hadron transverse momentum, 〈p 2 T 〉∝αα s (W 2)W instead of the ∝α s (W 2)W 2 behaviour expected in theOα s ) approximation. Implications for detector design and pattern recognition at LEP are also discussed.
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Mazzanti, P., Odorico, R. A Monte Carlo program for QCD event simulation ine +e− annihilation at LEP energies. Z. Phys. C - Particles and Fields 7, 61–72 (1980). https://doi.org/10.1007/BF01577322
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DOI: https://doi.org/10.1007/BF01577322