Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV

Consistent measurements of event-shape variables and alpha_s using the complete set of data taken with the ALEPH detector at LEP are presented. The strong coupling constant is determined from a fit of O(alpha_s^2)+NLLA QCD calculations to distributions of six event-shape variables at eight centre-of...

Descripción completa

Detalles Bibliográficos
Autor principal: CERN. Geneva. ALEPH
Lenguaje:eng
Publicado: 2002
Materias:
XX
Acceso en línea:http://cds.cern.ch/record/644928
_version_ 1780900820844281856
author CERN. Geneva. ALEPH
author_facet CERN. Geneva. ALEPH
author_sort CERN. Geneva. ALEPH
collection CERN
description Consistent measurements of event-shape variables and alpha_s using the complete set of data taken with the ALEPH detector at LEP are presented. The strong coupling constant is determined from a fit of O(alpha_s^2)+NLLA QCD calculations to distributions of six event-shape variables at eight centre-of-mass energies. A new method is proposed to estimate theoretical systematic uncertainties. The results are compared to the expected evolution of alpha_s.
id cern-644928
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
record_format invenio
spelling cern-6449282022-01-27T08:58:20Zhttp://cds.cern.ch/record/644928engCERN. Geneva. ALEPHMeasurement of alpha_s at centre-of-mass energies between 91 and 209GeVXXConsistent measurements of event-shape variables and alpha_s using the complete set of data taken with the ALEPH detector at LEP are presented. The strong coupling constant is determined from a fit of O(alpha_s^2)+NLLA QCD calculations to distributions of six event-shape variables at eight centre-of-mass energies. A new method is proposed to estimate theoretical systematic uncertainties. The results are compared to the expected evolution of alpha_s.CERN-ALEPH-2002-012CERN-ALEPH-CONF-2002-002oai:cds.cern.ch:6449282002-06-28
spellingShingle XX
CERN. Geneva. ALEPH
Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title_full Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title_fullStr Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title_full_unstemmed Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title_short Measurement of alpha_s at centre-of-mass energies between 91 and 209GeV
title_sort measurement of alpha_s at centre-of-mass energies between 91 and 209gev
topic XX
url http://cds.cern.ch/record/644928
work_keys_str_mv AT cerngenevaaleph measurementofalphasatcentreofmassenergiesbetween91and209gev

Ejemplares similares