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.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorKhalek, S. Abdelen_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorAbi, B.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2015-01-16T23:04:13Z
dc.date.available2015-01-16T23:04:13Z
dc.date.created2014-10-01en_US
dc.date.issued2014-10-01en_US
dc.description.abstractMeasurements of two-particle correlation functions and the first five azimuthal harmonics, v₁ to v₅, 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 "ridgelike" correlations are observed for pairs with small relative azimuthal angle (|Δϕ| < π/3) back-to-back pairs (|Δϕ| > )π/3) over the transverse momentum range 0.4 < pT < 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 vn as a function of pT and event activity. The extracted vn values for n=2 to 5 decrease with n. The v₂ and v₃ values are found to be positive in the measured pT range. The v₁ is also measured as a function of pT and is observed to change sign around pT ≈ 1.5–2.0 GeV and then increase to about 0.1 for pT > 4 GeV. The v₂(pT), v₃(pT), and v₄(pT) are compared to the vn 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 pT of particles produced in the two collision systems.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector." Physical Review C 90(4): 044906.en_US
dc.identifier.issn0556-2813en_US
dc.identifier.issue4en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4270
dc.identifier.volume90en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevC.90.044906
dc.rightsCC BY 3.0 (Attribution)en_US
dc.rights©2014 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourcePhysical Review C
dc.subjectProton-lead interactionsen_US
dc.subjectLead-lead interactionsen_US
dc.subjectEvent activitiesen_US
dc.subjectFourier seriesen_US
dc.titleMeasurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √sNN = 5.02 TeV Proton-Lead Collisions with the ATLAS Detectoren_US
dc.typeTexten_US
dc.type.genreArticleen_US

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Izen, Joseph M.