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

Frederix, Rikkert LU orcid ; Frixione, Stefano ; Melnikov, Kirill and Zanderighi, Giulia (2010) In Journal of High Energy Physics 2010(11).
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 highmultiplicity 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... (More)

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 highmultiplicity 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.

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author
; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Jets, LEP HERA and SLC Physics, NLO Computations, QCD
in
Journal of High Energy Physics
volume
2010
issue
11
article number
050
pages
25 pages
publisher
Springer
external identifiers
  • scopus:84856366986
ISSN
1029-8479
DOI
10.1007/JHEP11(2010)050
language
English
LU publication?
no
id
c7c58e89-034c-43a4-a70f-f8bddba2ec8b
date added to LUP
2019-05-28 15:12:20
date last changed
2022-01-31 21:04:35
@article{c7c58e89-034c-43a4-a70f-f8bddba2ec8b,
  abstract     = {{<p>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 <sup>+</sup>e <sup>-</sup> 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 highmultiplicity jet final states with parton showers. We show that a competitive value of the strong coupling constant α <sub>s</sub>(M <sub>Z</sub>) = 0.1156 <sub>-0.0034</sub> <sup>+0.0041</sup> can be extracted from the distribution of the five-jet resolution parameter and the five-jet rate at LEP1 and LEP2.</p>}},
  author       = {{Frederix, Rikkert and Frixione, Stefano and Melnikov, Kirill and Zanderighi, Giulia}},
  issn         = {{1029-8479}},
  keywords     = {{Jets; LEP HERA and SLC Physics; NLO Computations; QCD}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{NLO QCD corrections to five-jet production at LEP and the extraction of α <sub>s</sub>(M <sub>Z</sub>)}},
  url          = {{http://dx.doi.org/10.1007/JHEP11(2010)050}},
  doi          = {{10.1007/JHEP11(2010)050}},
  volume       = {{2010}},
  year         = {{2010}},
}