NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$

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 pert...

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Detalles Bibliográficos
Autores principales: Frederix, Rikkert, Frixione, Stefano, Melnikov, Kirill, Zanderighi, Giulia
Lenguaje:eng
Publicado: 2010
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1007/JHEP11(2010)050
http://cds.cern.ch/record/1288431
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author Frederix, Rikkert
Frixione, Stefano
Melnikov, Kirill
Zanderighi, Giulia
author_facet Frederix, Rikkert
Frixione, Stefano
Melnikov, Kirill
Zanderighi, Giulia
author_sort Frederix, Rikkert
collection CERN
description 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.
id cern-1288431
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
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spelling cern-12884312019-09-30T06:29:59Zdoi:10.1007/JHEP11(2010)050http://cds.cern.ch/record/1288431engFrederix, RikkertFrixione, StefanoMelnikov, KirillZanderighi, GiuliaNLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$Particle Physics - PhenomenologyThe 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.arXiv:1008.5313CERN-PH-TH-2010-185oai:cds.cern.ch:12884312010-09-01
spellingShingle Particle Physics - Phenomenology
Frederix, Rikkert
Frixione, Stefano
Melnikov, Kirill
Zanderighi, Giulia
NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title_full NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title_fullStr NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title_full_unstemmed NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title_short NLO QCD corrections to five-jet production at LEP and the extraction of $\alpha_{s}(M_Z)$
title_sort nlo qcd corrections to five-jet production at lep and the extraction of $\alpha_{s}(m_z)$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP11(2010)050
http://cds.cern.ch/record/1288431
work_keys_str_mv AT frederixrikkert nloqcdcorrectionstofivejetproductionatlepandtheextractionofalphasmz
AT frixionestefano nloqcdcorrectionstofivejetproductionatlepandtheextractionofalphasmz
AT melnikovkirill nloqcdcorrectionstofivejetproductionatlepandtheextractionofalphasmz
AT zanderighigiulia nloqcdcorrectionstofivejetproductionatlepandtheextractionofalphasmz

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