NLO QCD corrections to five-jet production at LEP and the extraction of α s (M Z )

2010/08/31 by Rikkert Frederix, Stefano Frixione, Kirill Melnikov +1 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1007/jhep11(2010)050

published as JHEP 1011:050,2010 · 25 pages, 5 figures. Published version (3 references addded, 1 sentence rephrased)

openalex publication_date 2010/11/01 · arxiv created 2010/11/29 · arxiv updated 2011/03/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 α_s( M_Z ) = 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.

Citations

• Review of Particle Physics
• One-loop amplitudes forW+3 jet production in hadron collisions
• Event generation with SHERPA 1.1
• Theoretical uncertainties on αsfrom event-shape variables in e+e−annihilations
• Event shapes and jet rates in electron-positron annihilation at NNLO
• A study of the energy evolution of event shape distributions and their means with the DELPHI detector at LEP
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• JETS and QCD: a historical review of the discovery of the quark and gluon jets and its impact on QCD
• NLO QCD corrections to the production of Higgs plus two jets at the LHC