Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC

Measurements are presented from proton-proton collisions at centre-of-mass energies of root √s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum a...

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Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Particle physics
Physics
Phase space
Multiplicity (mathematics)
Nuclear physics
Monte carlo method
Pseudorapidity
Transverse momentum
Atlas detector
Charged particle
Large hadron collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125349
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125349
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Particle physics
Physics
Phase space
Multiplicity (mathematics)
Nuclear physics
Monte carlo method
Pseudorapidity
Transverse momentum
Atlas detector
Charged particle
Large hadron collider
spellingShingle Física
Particle physics
Physics
Phase space
Multiplicity (mathematics)
Nuclear physics
Monte carlo method
Pseudorapidity
Transverse momentum
Atlas detector
Charged particle
Large hadron collider
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
topic_facet Física
Particle physics
Physics
Phase space
Multiplicity (mathematics)
Nuclear physics
Monte carlo method
Pseudorapidity
Transverse momentum
Atlas detector
Charged particle
Large hadron collider
description Measurements are presented from proton-proton collisions at centre-of-mass energies of root √s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. Measurements in different regions of phase space are shown, providing diffraction-reduced measurements as well as more inclusive ones. The observed distributions are corrected to well-defined phase-space regions, using model-independent corrections. The results are compared to each other and to various Monte Carlo (MC) models, including a new AMBT1 pythia6 tune. In all the kinematic regions considered, the particle multiplicities are higher than predicted by the MC models. The central charged-particle multiplicity per event and unit of pseudorapidity, for tracks with p<sub>T</sub> > 100 MeV, is measured to be 3.483 ± 0.009 (stat) ± 0.106 (syst) at root √s = 0.9 TeV and 5.630 ± 0.003 (stat) ± 0.169 (syst) at root √s = 7 TeV.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
title Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
title_short Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
title_full Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
title_fullStr Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
title_full_unstemmed Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
title_sort charged-particle multiplicities in pp interactions measured with the atlas detector at the lhc
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/125349
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