Measurements of the structure of quark and gluon jets in hadronic Z decays

An experimental investigation of the structure of identified quark and gluon jets is presented. Observables related to both the global and internal structure of jets are measured; this allows for tests of QCD over a wide range of transverse momentum scales. The observables include distributions of j...

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Main Authors: BARATE, R., THULASIDAS, M.
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 2000
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Online Access:https://ink.library.smu.edu.sg/sis_research/5850
https://ink.library.smu.edu.sg/context/sis_research/article/6853/viewcontent/ep_98_016.pdf
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spelling sg-smu-ink.sis_research-68532021-03-19T10:25:55Z Measurements of the structure of quark and gluon jets in hadronic Z decays BARATE, R. THULASIDAS, M. An experimental investigation of the structure of identified quark and gluon jets is presented. Observables related to both the global and internal structure of jets are measured; this allows for tests of QCD over a wide range of transverse momentum scales. The observables include distributions of jet-shape variables, the mean and standard deviation of the subjet multiplicity distribution and the fragmentation function for charged particles. The data are compared with predictions of perturbative QCD as well as QCD-based Monte Carlo models. In certain kinematic regions the measurements are sensitive mainly to perturbatively calculable effects, allowing for a test of QCD. The comparisons are also extended into regions where nonperturbative effects become large, and in this way the transition from hard to soft QCD is investigated. It is found that by including leading and next-to-leading logarithmic contributions in the QCD predictions, the agreement with the data can be extended to lower transverse momentum scales, especially for gluon jets. 2000-01-01T08:00:00Z text application/pdf https://ink.library.smu.edu.sg/sis_research/5850 info:doi/10.1007/s100520000474 https://ink.library.smu.edu.sg/context/sis_research/article/6853/viewcontent/ep_98_016.pdf http://creativecommons.org/licenses/by-nc-nd/4.0/ Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University Computer Sciences Databases and Information Systems
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Computer Sciences
Databases and Information Systems
spellingShingle Computer Sciences
Databases and Information Systems
BARATE, R.
THULASIDAS, M.
Measurements of the structure of quark and gluon jets in hadronic Z decays
description An experimental investigation of the structure of identified quark and gluon jets is presented. Observables related to both the global and internal structure of jets are measured; this allows for tests of QCD over a wide range of transverse momentum scales. The observables include distributions of jet-shape variables, the mean and standard deviation of the subjet multiplicity distribution and the fragmentation function for charged particles. The data are compared with predictions of perturbative QCD as well as QCD-based Monte Carlo models. In certain kinematic regions the measurements are sensitive mainly to perturbatively calculable effects, allowing for a test of QCD. The comparisons are also extended into regions where nonperturbative effects become large, and in this way the transition from hard to soft QCD is investigated. It is found that by including leading and next-to-leading logarithmic contributions in the QCD predictions, the agreement with the data can be extended to lower transverse momentum scales, especially for gluon jets.
format text
author BARATE, R.
THULASIDAS, M.
author_facet BARATE, R.
THULASIDAS, M.
author_sort BARATE, R.
title Measurements of the structure of quark and gluon jets in hadronic Z decays
title_short Measurements of the structure of quark and gluon jets in hadronic Z decays
title_full Measurements of the structure of quark and gluon jets in hadronic Z decays
title_fullStr Measurements of the structure of quark and gluon jets in hadronic Z decays
title_full_unstemmed Measurements of the structure of quark and gluon jets in hadronic Z decays
title_sort measurements of the structure of quark and gluon jets in hadronic z decays
publisher Institutional Knowledge at Singapore Management University
publishDate 2000
url https://ink.library.smu.edu.sg/sis_research/5850
https://ink.library.smu.edu.sg/context/sis_research/article/6853/viewcontent/ep_98_016.pdf
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