Studies of hadronic event structure and comparisons with QCD models at the Zº resonance

Autores
Dova, María Teresa; L3 Collaboration
Año de publicación
1992
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The structure of hadronic events from Z0 decay is studied by measuring event shape variables, factorial moments, and the energy flow distribution. The distributions, after correction for detector effects and initial and final state radiation, are compared with the predictions of different QCD Monte Carlo programs with optimized parameter values. These Monte Carlo programs use either the second order matrix element or the parton shower evolution for the perturbative QCD calculations and use the string, the cluster, or the independent fragmentation model for hadronization. Both parton shower and O(α2s) matrix element based models with string fragmentation describe the data well. The predictions of the model based on parton shower and cluster fragmentation are also in good agreement with the data. The model with independent fragmentation gives a poor description of the energy flow distribution. The predicted energy evolutions for the mean values of thrust, sphericity, aplanarity, and charge multiplicity are compared with the data measured at different center-of-mass energies. The parton shower based models with string or cluster fragmentation are found to describe the energy dependences well while the model based on the O(α2s) calculation fails to reproduce the energy dependences of these mean values.
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/81054
Acceder
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network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Studies of hadronic event structure and comparisons with QCD models at the Zº resonanceDova, María TeresaL3 CollaborationCiencias ExactasFísicaquantum chromodynamicspartonL3 detectorThe structure of hadronic events from Z<sup>0</sup> decay is studied by measuring event shape variables, factorial moments, and the energy flow distribution. The distributions, after correction for detector effects and initial and final state radiation, are compared with the predictions of different QCD Monte Carlo programs with optimized parameter values. These Monte Carlo programs use either the second order matrix element or the parton shower evolution for the perturbative QCD calculations and use the string, the cluster, or the independent fragmentation model for hadronization. Both parton shower and O(α<sup>2</sup><sub>s</sub>) matrix element based models with string fragmentation describe the data well. The predictions of the model based on parton shower and cluster fragmentation are also in good agreement with the data. The model with independent fragmentation gives a poor description of the energy flow distribution. The predicted energy evolutions for the mean values of thrust, sphericity, aplanarity, and charge multiplicity are compared with the data measured at different center-of-mass energies. The parton shower based models with string or cluster fragmentation are found to describe the energy dependences well while the model based on the O(α<sup>2</sup><sub>s</sub>) calculation fails to reproduce the energy dependences of these mean values.Facultad de Ciencias Exactas1992-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf39-61http://sedici.unlp.edu.ar/handle/10915/81054enginfo:eu-repo/semantics/altIdentifier/issn/0170-9739info:eu-repo/semantics/altIdentifier/doi/10.1007/BF01558288info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:01Zoai:sedici.unlp.edu.ar:10915/81054Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:01.854SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
title Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
spellingShingle Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
Dova, María Teresa
Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
title_short Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
title_full Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
title_fullStr Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
title_full_unstemmed Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
title_sort Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
dc.creator.none.fl_str_mv Dova, María Teresa
L3 Collaboration
author Dova, María Teresa
author_facet Dova, María Teresa
L3 Collaboration
author_role author
author2 L3 Collaboration
author2_role author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
topic Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
dc.description.none.fl_txt_mv The structure of hadronic events from Z<sup>0</sup> decay is studied by measuring event shape variables, factorial moments, and the energy flow distribution. The distributions, after correction for detector effects and initial and final state radiation, are compared with the predictions of different QCD Monte Carlo programs with optimized parameter values. These Monte Carlo programs use either the second order matrix element or the parton shower evolution for the perturbative QCD calculations and use the string, the cluster, or the independent fragmentation model for hadronization. Both parton shower and O(α<sup>2</sup><sub>s</sub>) matrix element based models with string fragmentation describe the data well. The predictions of the model based on parton shower and cluster fragmentation are also in good agreement with the data. The model with independent fragmentation gives a poor description of the energy flow distribution. The predicted energy evolutions for the mean values of thrust, sphericity, aplanarity, and charge multiplicity are compared with the data measured at different center-of-mass energies. The parton shower based models with string or cluster fragmentation are found to describe the energy dependences well while the model based on the O(α<sup>2</sup><sub>s</sub>) calculation fails to reproduce the energy dependences of these mean values.
Facultad de Ciencias Exactas
description The structure of hadronic events from Z<sup>0</sup> decay is studied by measuring event shape variables, factorial moments, and the energy flow distribution. The distributions, after correction for detector effects and initial and final state radiation, are compared with the predictions of different QCD Monte Carlo programs with optimized parameter values. These Monte Carlo programs use either the second order matrix element or the parton shower evolution for the perturbative QCD calculations and use the string, the cluster, or the independent fragmentation model for hadronization. Both parton shower and O(α<sup>2</sup><sub>s</sub>) matrix element based models with string fragmentation describe the data well. The predictions of the model based on parton shower and cluster fragmentation are also in good agreement with the data. The model with independent fragmentation gives a poor description of the energy flow distribution. The predicted energy evolutions for the mean values of thrust, sphericity, aplanarity, and charge multiplicity are compared with the data measured at different center-of-mass energies. The parton shower based models with string or cluster fragmentation are found to describe the energy dependences well while the model based on the O(α<sup>2</sup><sub>s</sub>) calculation fails to reproduce the energy dependences of these mean values.
publishDate 1992
dc.date.none.fl_str_mv 1992-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/81054
url http://sedici.unlp.edu.ar/handle/10915/81054
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0170-9739
info:eu-repo/semantics/altIdentifier/doi/10.1007/BF01558288
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
39-61
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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