Abstract
The highest exclusive jet multiplicity studied at LEP experiments is five. In this paper we compute the next-to-leading order QCD corrections to e + e − annihilation to five jets, essentially closing the (pure) perturbative QCD studies of exclusive jetty final states at LEP. We compare fixed-order perturbative results with ALEPH data. We estimate hadronization corrections to five-jet observables using the event generator SHERPA, which employs the CKKW procedure to combine a reliable perturbative treatment of high-multiplicity jet final states with parton showers. We show that a competitive value of the strong coupling constant \( {\alpha_s}\left( {{M_Z}} \right) = 0.1156_{ - 0.0034}^{ + 0.0041} \) can be extracted from the distribution of the five-jet resolution parameter and the five-jet rate at LEP1 and LEP2.
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ArXiv ePrint: 1008.5313
On leave of absence from INFN, Sez. di Genova, Italy. (Stefano Frixione)
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Frederix, R., Frixione, S., Melnikov, K. et al. NLO QCD corrections to five-jet production at LEP and the extraction of α s (M Z ). J. High Energ. Phys. 2010, 50 (2010). https://doi.org/10.1007/JHEP11(2010)050
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DOI: https://doi.org/10.1007/JHEP11(2010)050