Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector

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

doi:10.1103/PhysRevD.83.112001

Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector

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

93 Citations (Scopus)

Abstract

Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The "underlying event" is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to the underlying event. In each of these regions, distributions of the charged particle multiplicity, transverse momentum density, and average p_T are measured. The data show generally higher underlying event activity than that predicted by Monte Carlo models tuned to pre-LHC data.

Original language	English
Journal	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Volume	83
Issue number	11
Pages (from-to)	112001
Number of pages	34
ISSN	1550-7998
DOIs	https://doi.org/10.1103/PhysRevD.83.112001
Publication status	Published - 31 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., Petersen, T. C., Xella, S., Kittelmann, T. H., & Boelaert, N. M. P. (2011). Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), 83(11), 112001. https://doi.org/10.1103/PhysRevD.83.112001

Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector. / Aad..[et al.], G.; Dam, Mogens ; Hansen, John Renner et al.

In: Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol. 83, No. 11, 31.05.2011, p. 112001.

Research output: Contribution to journal › Journal article › Research › peer-review

Aad..[et al.], G, Dam, M , Hansen, JR , Hansen, JB , Hansen, JD , Hansen, PH, Jørgensen, MD, Klinkby, EB, Petersen, TC , Xella, S, Kittelmann, TH & Boelaert, NMP 2011, 'Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector', Physical Review D (Particles, Fields, Gravitation and Cosmology), vol. 83, no. 11, pp. 112001. https://doi.org/10.1103/PhysRevD.83.112001

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title = "Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector",

abstract = "Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The {"}underlying event{"} is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to the underlying event. In each of these regions, distributions of the charged particle multiplicity, transverse momentum density, and average pT are measured. The data show generally higher underlying event activity than that predicted by Monte Carlo models tuned to pre-LHC data.",

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AU - Hansen, Jørgen Beck

AU - Hansen, Jørn Dines

AU - Hansen, Peter Henrik

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Petersen, Troels Christian

AU - Xella, Stefania

AU - Kittelmann, Thomas Høvring

AU - Boelaert, Nele Maria Philomena

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N2 - Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The "underlying event" is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to the underlying event. In each of these regions, distributions of the charged particle multiplicity, transverse momentum density, and average pT are measured. The data show generally higher underlying event activity than that predicted by Monte Carlo models tuned to pre-LHC data.

AB - Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The "underlying event" is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to the underlying event. In each of these regions, distributions of the charged particle multiplicity, transverse momentum density, and average pT are measured. The data show generally higher underlying event activity than that predicted by Monte Carlo models tuned to pre-LHC data.

U2 - 10.1103/PhysRevD.83.112001

DO - 10.1103/PhysRevD.83.112001

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ER -

Measurement of underlying event characteristics using charged particles in pp collisions at sqrt{s} = 900 GeV and 7 TeV with the ATLAS detector

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