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

G. Aad...[et al.]; Mogens Dam; John Renner Hansen; Jørgen Beck Hansen; Jørn Dines Hansen; Peter Henrik Hansen; Morten Dam Jørgensen; Esben Bryndt Klinkby; Stefania Xella; Troels Christian Petersen; Thomas Høvring Kittelmann; Nele Maria Philomena Boelaert

doi:10.1088/1367-2630/13/5/053033

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

G. Aad...[et al.], Mogens Dam, John Renner Hansen, Jørgen Beck Hansen, Jørn Dines Hansen, Peter Henrik Hansen, Morten Dam Jørgensen, Esben Bryndt Klinkby, Stefania Xella, Troels Christian Petersen, Thomas Høvring Kittelmann, Nele Maria Philomena Boelaert

312 Citations (Scopus)

Abstract

Measurements are presented from proton-proton collisions at centre-of-mass energies of s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimumbias 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 pT < 100 MeV, is measured to be 3.483±0.009 (stat)±0.106 (syst) at s = 0.9 TeV and 5.630±0.003 (stat)±0.169 (syst) at s = 7 TeV.

Original language	English
Journal	New Journal of Physics
Volume	13
Pages (from-to)	053033
Number of pages	57
ISSN	1367-2630
DOIs	https://doi.org/10.1088/1367-2630/13/5/053033
Publication status	Published - 19 May 2011

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Aad...[et al.], G., Dam, M., Hansen, J. R., Hansen, J. B., Hansen, J. D., Hansen, P. H., Jørgensen, M. D., Klinkby, E. B., Xella, S., Petersen, T. C., Kittelmann, T. H., & Boelaert, N. M. P. (2011). Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC. New Journal of Physics, 13, 053033. https://doi.org/10.1088/1367-2630/13/5/053033

@article{8388d5886cee4bb6aa3f2d01a0da2cd8,

title = "Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC",

abstract = "Measurements are presented from proton-proton collisions at centre-of-mass energies of s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimumbias 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 pT < 100 MeV, is measured to be 3.483±0.009 (stat)±0.106 (syst) at s = 0.9 TeV and 5.630±0.003 (stat)±0.169 (syst) at s = 7 TeV.",

author = "{Aad...[et al.]}, G. and Mogens Dam and Hansen, {John Renner} and Hansen, {J{\o}rgen Beck} and Hansen, {J{\o}rn Dines} and Hansen, {Peter Henrik} and J{\o}rgensen, {Morten Dam} and Klinkby, {Esben Bryndt} and Stefania Xella and Petersen, {Troels Christian} and Kittelmann, {Thomas H{\o}vring} and Boelaert, {Nele Maria Philomena}",

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doi = "10.1088/1367-2630/13/5/053033",

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TY - JOUR

T1 - Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC

AU - Aad...[et al.], G.

AU - Dam, Mogens

AU - Hansen, John Renner

AU - Hansen, Jørgen Beck

AU - Hansen, Jørn Dines

AU - Hansen, Peter Henrik

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Xella, Stefania

AU - Petersen, Troels Christian

AU - Kittelmann, Thomas Høvring

AU - Boelaert, Nele Maria Philomena

PY - 2011/5/19

Y1 - 2011/5/19

N2 - Measurements are presented from proton-proton collisions at centre-of-mass energies of s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimumbias 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 pT < 100 MeV, is measured to be 3.483±0.009 (stat)±0.106 (syst) at s = 0.9 TeV and 5.630±0.003 (stat)±0.169 (syst) at s = 7 TeV.

AB - Measurements are presented from proton-proton collisions at centre-of-mass energies of s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimumbias 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 pT < 100 MeV, is measured to be 3.483±0.009 (stat)±0.106 (syst) at s = 0.9 TeV and 5.630±0.003 (stat)±0.169 (syst) at s = 7 TeV.

U2 - 10.1088/1367-2630/13/5/053033

DO - 10.1088/1367-2630/13/5/053033

M3 - Journal article

SN - 1367-2630

VL - 13

SP - 053033

JO - New Journal of Physics

JF - New Journal of Physics

ER -

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

Abstract

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