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

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...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1992
Materias:
Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/81054
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-81054
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
Física
quantum chromodynamics
parton
L3 detector
spellingShingle Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
Dova, María Teresa
L3 Collaboration
Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
topic_facet Ciencias Exactas
Física
quantum chromodynamics
parton
L3 detector
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.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Studies of hadronic event structure and comparisons with QCD models at the Zº resonance
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
publishDate 1992
url http://sedici.unlp.edu.ar/handle/10915/81054
work_keys_str_mv AT dovamariateresa studiesofhadroniceventstructureandcomparisonswithqcdmodelsatthezoresonance
AT l3collaboration studiesofhadroniceventstructureandcomparisonswithqcdmodelsatthezoresonance
bdutipo_str Repositorios
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