QCD studies in e+e− annihilation from 30 GeV to 189 GeV

We present results obtained from a study of the structure of hadronic events recorded by the L3 detector at various centre-of-mass energies. The distributions of event shape variables and the energy dependence of their mean values are measured from 30 GeV to 189 GeV and compared with various QCD mod...

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Guardado en:
Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Exactas
structure of hadronic events
L3 detector
centre-of-mass energies
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75661
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75661
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
structure of hadronic events
L3 detector
centre-of-mass energies
spellingShingle Ciencias Exactas
structure of hadronic events
L3 detector
centre-of-mass energies
Dova, María Teresa
L3 Collaboration
QCD studies in e+e− annihilation from 30 GeV to 189 GeV
topic_facet Ciencias Exactas
structure of hadronic events
L3 detector
centre-of-mass energies
description We present results obtained from a study of the structure of hadronic events recorded by the L3 detector at various centre-of-mass energies. The distributions of event shape variables and the energy dependence of their mean values are measured from 30 GeV to 189 GeV and compared with various QCD models. The energy dependence of the moments of event shape variables is used to test a power law ansatz for the non-perturbative component. We obtain a universal value of Ž 2 the non-perturbative parameter a s 0.537 ± 0.073. From a comparison with resummed O(αs2)QCD calculations, we 0 s determine the strong coupling constant at each of the selected energies. The measurements demonstrate the running of αs as expected in QCD with a value of αs(mZ) = 0.1215 ± 0.0012 (exp) ± 0.0061 (th).
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title QCD studies in e+e− annihilation from 30 GeV to 189 GeV
title_short QCD studies in e+e− annihilation from 30 GeV to 189 GeV
title_full QCD studies in e+e− annihilation from 30 GeV to 189 GeV
title_fullStr QCD studies in e+e− annihilation from 30 GeV to 189 GeV
title_full_unstemmed QCD studies in e+e− annihilation from 30 GeV to 189 GeV
title_sort qcd studies in e+e− annihilation from 30 gev to 189 gev
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/75661
work_keys_str_mv AT dovamariateresa qcdstudiesineeannihilationfrom30gevto189gev
AT l3collaboration qcdstudiesineeannihilationfrom30gevto189gev
bdutipo_str Repositorios
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