A measurement of the di-jet cross-sections in two photon physics at LEP 2

This thesis presents a study of di-jet production in untagged two photon events in the ALEPH detector at LEP with sq root s=183 GeV. A low background sample of 145146 untagged gamma gamma events is obtained and from this 2346 di-jet events are found. A clustering algorithm, KTCLUS, is used to recons...

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Detalles Bibliográficos
Autor principal: Hodgson, P
Lenguaje:eng
Publicado: Sheffield U. 2001
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/784033
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author Hodgson, P
author_facet Hodgson, P
author_sort Hodgson, P
collection CERN
description This thesis presents a study of di-jet production in untagged two photon events in the ALEPH detector at LEP with sq root s=183 GeV. A low background sample of 145146 untagged gamma gamma events is obtained and from this 2346 di-jet events are found. A clustering algorithm, KTCLUS, is used to reconstruct the jet momenta. The data is corrected back to hadron level using the PHOJET Monte Carlo and this sample is compared with two independent NLO QCD calculations. Good agreement is seen except at the lowest jet P sub T , where the calculations overshoot the data; however, it should be noted that perturbative QCD is less reliable at low P sub T.
id cern-784033
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
publisher Sheffield U.
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spelling cern-7840332019-09-30T06:29:59Zhttp://cds.cern.ch/record/784033engHodgson, PA measurement of the di-jet cross-sections in two photon physics at LEP 2Particle Physics - ExperimentThis thesis presents a study of di-jet production in untagged two photon events in the ALEPH detector at LEP with sq root s=183 GeV. A low background sample of 145146 untagged gamma gamma events is obtained and from this 2346 di-jet events are found. A clustering algorithm, KTCLUS, is used to reconstruct the jet momenta. The data is corrected back to hadron level using the PHOJET Monte Carlo and this sample is compared with two independent NLO QCD calculations. Good agreement is seen except at the lowest jet P sub T , where the calculations overshoot the data; however, it should be noted that perturbative QCD is less reliable at low P sub T.Sheffield U.oai:cds.cern.ch:7840332001
spellingShingle Particle Physics - Experiment
Hodgson, P
A measurement of the di-jet cross-sections in two photon physics at LEP 2
title A measurement of the di-jet cross-sections in two photon physics at LEP 2
title_full A measurement of the di-jet cross-sections in two photon physics at LEP 2
title_fullStr A measurement of the di-jet cross-sections in two photon physics at LEP 2
title_full_unstemmed A measurement of the di-jet cross-sections in two photon physics at LEP 2
title_short A measurement of the di-jet cross-sections in two photon physics at LEP 2
title_sort measurement of the di-jet cross-sections in two photon physics at lep 2
topic Particle Physics - Experiment
url http://cds.cern.ch/record/784033
work_keys_str_mv AT hodgsonp ameasurementofthedijetcrosssectionsintwophotonphysicsatlep2
AT hodgsonp measurementofthedijetcrosssectionsintwophotonphysicsatlep2

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