Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse m...

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Autor principal: Multitudinario:3222
Formato: JOUR
Materias:
900 GeV
ATLAS
Charged-particle
LHC
Minimum bias
Multiplicities
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v688_n1_p21_Multitudinario
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v688_n1_p21_Multitudinario
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spelling todo:paper_03702693_v688_n1_p21_Multitudinario2023-10-03T15:29:03Z Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC Multitudinario:3222 900 GeV ATLAS Charged-particle LHC Minimum bias Multiplicities The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and p T > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. © CERN, for the benefit of the ATLAS Collaboration. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v688_n1_p21_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 900 GeV
ATLAS
Charged-particle
LHC
Minimum bias
Multiplicities
spellingShingle 900 GeV
ATLAS
Charged-particle
LHC
Minimum bias
Multiplicities
Multitudinario:3222
Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
topic_facet 900 GeV
ATLAS
Charged-particle
LHC
Minimum bias
Multiplicities
description The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and p T > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. © CERN, for the benefit of the ATLAS Collaboration.
format JOUR
author Multitudinario:3222
author_facet Multitudinario:3222
author_sort Multitudinario:3222
title Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
title_short Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
title_full Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
title_fullStr Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
title_full_unstemmed Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
title_sort charged-particle multiplicities in pp interactions at √ s = 900 gev measured with the atlas detector at the lhc
url http://hdl.handle.net/20.500.12110/paper_03702693_v688_n1_p21_Multitudinario
work_keys_str_mv AT multitudinario3222 chargedparticlemultiplicitiesinppinteractionsats900gevmeasuredwiththeatlasdetectoratthelhc
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