Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector

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dc.contributor.authorAad, G
dc.contributor.authorAbbott, B
dc.contributor.authorAbdallah, J
dc.contributor.authorAbdel Khalek, S
dc.contributor.authorAbdinov, O
dc.contributor.authorAben, R
dc.contributor.authorAbi, B
dc.contributor.authorAbolins, M
dc.contributor.authorAbouZeid, O S
dc.contributor.authorAbramowicz, H
dc.contributor.authorAbreu, H
dc.contributor.authorAbreu, R
dc.contributor.authorAbulaiti, Y
dc.contributor.authorAcharya, B S
dc.contributor.authorAdamczyk, L
dc.contributor.authorAdams, D L
dc.contributor.authorAdelman, J
dc.contributor.authorAdomeit, S
dc.contributor.authorAdye, T
dc.contributor.authorAgatonovic-Jovin, T
dc.contributor.authorAguilar-Saavedra, J A
dc.contributor.authorAgustoni, M
dc.contributor.authorAhlen, S P
dc.contributor.authorAhmadov, F
dc.contributor.authorAielli, G
dc.contributor.authorAkerstedt, H
dc.contributor.authorÅkesson, T P A
dc.contributor.authorAkimoto, G
dc.contributor.authorAkimov, A V
dc.contributor.authorAlberghi, G L
dc.contributor.authorAlbert, J
dc.contributor.authorAlbrand, S
dc.date.accessioned2021-10-08T07:11:29Z
dc.date.available2021-10-08T07:11:29Z
dc.date.issued2014
dc.description.abstractMeasurements of two-particle correlation functions and the first five azimuthal harmonics, v 1 to v 5, are presented, using 28 nb − 1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √ sNN = 5 .02 TeV measured with the ATLAS detector at the LHC. Significant long-range “ridge-like” correlations are observed for pairs with small relative azimuthal angle (|∆ φ| < π/ 3) and back-to-back pairs (|∆ φ| > 2π/ 3) over the transverse momentum range 0 . 4 < p T < 12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics v n as a function of p T and event activity. The extracted v n values for n = 2 to 5 decrease with n. The v 2 and v 3 values are found to be positive in the measured p T range. The v 1 is also measured as a function of p T and is observed to change sign around p T ≈ 1 . 5–2.0 GeV and then increase to about 0.1 for p T > 4 GeV. The v 2 ( p T ) , v 3 ( p T ) and v 4 ( p T ) are compared to the v n coefficients in Pb+Pb collisions at √ sNN = 2 .76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average p T of particles produced in the two collision systems.
dc.identifier.apacitationAad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., ... Albrand, S. (2014). Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector. <i>Physical Review C - Nuclear Physics</i>, 90(4), 174 - 177. http://hdl.handle.net/11427/34620en_ZA
dc.identifier.chicagocitationAad, G, B Abbott, J Abdallah, S Abdel Khalek, O Abdinov, R Aben, B Abi, et al "Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector." <i>Physical Review C - Nuclear Physics</i> 90, 4. (2014): 174 - 177. http://hdl.handle.net/11427/34620en_ZA
dc.identifier.citationAad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., Abi, B. & Abolins, M. et al. 2014. Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector. <i>Physical Review C - Nuclear Physics.</i> 90(4):174 - 177. http://hdl.handle.net/11427/34620en_ZA
dc.identifier.issn0556-2813
dc.identifier.issn1089-490X
dc.identifier.ris TY - Journal Article AU - Aad, G AU - Abbott, B AU - Abdallah, J AU - Abdel Khalek, S AU - Abdinov, O AU - Aben, R AU - Abi, B AU - Abolins, M AU - AbouZeid, O S AU - Abramowicz, H AU - Abreu, H AU - Abreu, R AU - Abulaiti, Y AU - Acharya, B S AU - Adamczyk, L AU - Adams, D L AU - Adelman, J AU - Adomeit, S AU - Adye, T AU - Agatonovic-Jovin, T AU - Aguilar-Saavedra, J A AU - Agustoni, M AU - Ahlen, S P AU - Ahmadov, F AU - Aielli, G AU - Akerstedt, H AU - Åkesson, T P A AU - Akimoto, G AU - Akimov, A V AU - Alberghi, G L AU - Albert, J AU - Albrand, S AB - Measurements of two-particle correlation functions and the first five azimuthal harmonics, v 1 to v 5, are presented, using 28 nb − 1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √ sNN = 5 .02 TeV measured with the ATLAS detector at the LHC. Significant long-range “ridge-like” correlations are observed for pairs with small relative azimuthal angle (|∆ φ| < π/ 3) and back-to-back pairs (|∆ φ| > 2π/ 3) over the transverse momentum range 0 . 4 < p T < 12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics v n as a function of p T and event activity. The extracted v n values for n = 2 to 5 decrease with n. The v 2 and v 3 values are found to be positive in the measured p T range. The v 1 is also measured as a function of p T and is observed to change sign around p T ≈ 1 . 5–2.0 GeV and then increase to about 0.1 for p T > 4 GeV. The v 2 ( p T ) , v 3 ( p T ) and v 4 ( p T ) are compared to the v n coefficients in Pb+Pb collisions at √ sNN = 2 .76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average p T of particles produced in the two collision systems. DA - 2014 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Physical Review C - Nuclear Physics LK - https://open.uct.ac.za PY - 2014 SM - 0556-2813 SM - 1089-490X T1 - Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector TI - Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector UR - http://hdl.handle.net/11427/34620 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34620
dc.identifier.vancouvercitationAad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, et al. Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector. Physical Review C - Nuclear Physics. 2014;90(4):174 - 177. http://hdl.handle.net/11427/34620.en_ZA
dc.publisher.departmentDepartment of Physics
dc.publisher.facultyFaculty of Science
dc.sourcePhysical Review C - Nuclear Physics
dc.source.journalissue4
dc.source.journalvolume90
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.1103/PhysRevC.90.044906
dc.subject.otherSubatomic Physics
dc.subject.otherPPB
dc.subject.othertwo-particle [correlation function]
dc.subject.othertransverse energy
dc.subject.otherTransverse-Momentum
dc.subject.othercorrelation: long-range [rapidity]
dc.subject.otherSide
dc.subject.otherATLAS
dc.subject.otherPa
dc.subject.otherQC
dc.subject.otherMultiplicity
dc.subject.otherSubatomär fysik
dc.subject.otherexperimental results
dc.subject.otherangular dependence
dc.subject.other530 Physics
dc.subject.otherIon Collisions
dc.subject.othermultiplicity [tracks]
dc.subject.otherCERN LHC Coll
dc.subject.otherscattering [p nucleus]
dc.subject.otherharmonic [expansion]
dc.subject.otherlead
dc.subject.otherFlow
dc.subject.other5020 GeV-cms/nucleon
dc.subject.othertransverse momentum dependence
dc.subject.otherPlus Pb Collisions
dc.titleMeasurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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