NLO QCD corrections to five-jet production at LEP and the extraction of alpha_s(M_Z)
arXiv:1008.5313 · doi:10.1007/JHEP11(2010)050
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(M_Z) = 0.1156 +0.0041 -0.0034 can be extracted from the distribution of the five-jet resolution parameter and the five-jet rate at LEP1 and LEP2.
25 pages, 5 figures. Published version (3 references addded, 1 sentence rephrased)
References in corpus (22)
- PYTHIA 6.4 Physics and Manual
- Parton distributions for the LHC
- Event generation with SHERPA 1.1
- Automation of next-to-leading order computations in QCD: the FKS subtraction
- Thrust at N^3LL with Power Corrections and a Precision Global Fit for alphas(mZ)
- Full one-loop amplitudes from tree amplitudes
- Parton Distributions for LHC
- A precise determination of alpha_s from LEP thrust data using effective field theory
- A Numerical Unitarity Formalism for Evaluating One-Loop Amplitudes
- Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders
- NNLO corrections to event shapes in annihilation
- NNLO corrections to 3-jet observables in electron-positron annihilation
- Second-order QCD corrections to the thrust distribution
- Resummation of heavy jet mass and comparison to LEP data
- Event shapes and jet rates in electron-positron annihilation at NNLO
- Jet rates in electron-positron annihilation at O(α_s^3) in QCD
- First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e^+e^- annihilations
- Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e+e- annihilations
- Update: Accurate Determinations of alpha_s from Realistic Lattice QCD
- One-loop amplitudes for W+3 jet production in hadron collisions
- Extraction of alpha_s from radiative Upsilon(1S) decays
- Precision measurements of alphas at HERA
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- Determination of the top quark mass from leptonic observables
- R2SM: a package for the analytic computation of the R2 Rational terms in the Standard Model of the Electroweak interactions
- Comparing efficient computation methods for massless QCD tree amplitudes: Closed Analytic Formulae versus Berends-Giele Recursion
- Thread-Scalable Evaluation of Multi-Jet Observables
- A Forward Branching Phase-Space Generator
- Determination of beyond NNLO using event shape averages
- Jet production at electron-positron colliders at next-to-next-to-next-to-leading order in QCD
- Numerical evaluation of NLO multiparton processes
- Perturbative QCD for the LHC