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Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS

Measurements of particle and transverse energy distributions are presented from proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36 and 7 TeV. The distributions are measured for charged particles, using the ATLAS tracking detectors, and for charged and neutral particles, using...

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Autor principal: Schulz, H
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:http://cds.cern.ch/record/1345717
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author Schulz, H
author_facet Schulz, H
author_sort Schulz, H
collection CERN
description Measurements of particle and transverse energy distributions are presented from proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36 and 7 TeV. The distributions are measured for charged particles, using the ATLAS tracking detectors, and for charged and neutral particles, using the calorimeters. Several well-defined phases space regions are measured, and inclusive "minimum bias" distributions are presented as well as measurements in regions defined with respect to the highest transverse energy particle in an event, which sensitive to the underlying event. In addition the energy flow around jet centres and the fragmentation of particles within jets are studied. The data are compared to several Monte Carlo models, including models with parameters tuned to ATLAS data. In particular, we present new tunes of the general purpose MC generators PYTHIA6 and HERWIG which improve upon previous ATLAS tunes, using a wider variety of measurements and/or higher precision data. Systematic studies on the sensitivity of the ATLAS data to the phenomenological model parameters, and on the compatability of LHC and Tevatron data sets, are also presented.
id cern-1345717
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-13457172019-09-30T06:29:59Zhttp://cds.cern.ch/record/1345717engSchulz, HMeasurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLASDetectors and Experimental TechniquesMeasurements of particle and transverse energy distributions are presented from proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36 and 7 TeV. The distributions are measured for charged particles, using the ATLAS tracking detectors, and for charged and neutral particles, using the calorimeters. Several well-defined phases space regions are measured, and inclusive "minimum bias" distributions are presented as well as measurements in regions defined with respect to the highest transverse energy particle in an event, which sensitive to the underlying event. In addition the energy flow around jet centres and the fragmentation of particles within jets are studied. The data are compared to several Monte Carlo models, including models with parameters tuned to ATLAS data. In particular, we present new tunes of the general purpose MC generators PYTHIA6 and HERWIG which improve upon previous ATLAS tunes, using a wider variety of measurements and/or higher precision data. Systematic studies on the sensitivity of the ATLAS data to the phenomenological model parameters, and on the compatability of LHC and Tevatron data sets, are also presented.ATL-PHYS-SLIDE-2011-153oai:cds.cern.ch:13457172011-04-19
spellingShingle Detectors and Experimental Techniques
Schulz, H
Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title_full Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title_fullStr Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title_full_unstemmed Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title_short Measurements of minimum bias and underlying event distributions and Monte Carlo generator tuning with ATLAS
title_sort measurements of minimum bias and underlying event distributions and monte carlo generator tuning with atlas
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1345717
work_keys_str_mv AT schulzh measurementsofminimumbiasandunderlyingeventdistributionsandmontecarlogeneratortuningwithatlas