Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data

The understanding of the transverse momentum (pT) resolution of the ATLAS Inner Detector is important for many physics analyses. A common approach to assess the agreement between full Monte Carlo simulation and data is to study well-measured particle decays. In this note, $K^0_s$ decays to two pions...

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Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2010
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1274005
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description The understanding of the transverse momentum (pT) resolution of the ATLAS Inner Detector is important for many physics analyses. A common approach to assess the agreement between full Monte Carlo simulation and data is to study well-measured particle decays. In this note, $K^0_s$ decays to two pions are used to quantify the pT resolution and scale of low momentum tracks, i.e. pT <~ 1GeV during the sqrt(s) = 900GeV run in 2009. The nominal Monte Carlo simulation is found to describe well the track pT resolution for pT > 500 MeV, while it is underestimated in both endcap regions for pT < 500 MeV. The track pT scale is globally well described by nominal Monte Carlo simulation within the statistical uncertainties.
id cern-1274005
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-12740052021-04-18T19:36:48Zhttp://cds.cern.ch/record/1274005engThe ATLAS collaborationEstimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision dataDetectors and Experimental TechniquesThe understanding of the transverse momentum (pT) resolution of the ATLAS Inner Detector is important for many physics analyses. A common approach to assess the agreement between full Monte Carlo simulation and data is to study well-measured particle decays. In this note, $K^0_s$ decays to two pions are used to quantify the pT resolution and scale of low momentum tracks, i.e. pT <~ 1GeV during the sqrt(s) = 900GeV run in 2009. The nominal Monte Carlo simulation is found to describe well the track pT resolution for pT > 500 MeV, while it is underestimated in both endcap regions for pT < 500 MeV. The track pT scale is globally well described by nominal Monte Carlo simulation within the statistical uncertainties.ATLAS-CONF-2010-009oai:cds.cern.ch:12740052010-06-24
spellingShingle Detectors and Experimental Techniques
The ATLAS collaboration
Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title_full Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title_fullStr Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title_full_unstemmed Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title_short Estimating Track Momentum Resolution in Minimum Bias Events using Simulation and K_s in sqrt(s) = 900 GeV collision data
title_sort estimating track momentum resolution in minimum bias events using simulation and k_s in sqrt(s) = 900 gev collision data
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1274005
work_keys_str_mv AT theatlascollaboration estimatingtrackmomentumresolutioninminimumbiaseventsusingsimulationandksinsqrts900gevcollisiondata

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