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1826212369037000704
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Massachusetts Institute of Technology. Department of Physics
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Massachusetts Institute of Technology. Department of Physics
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MIT
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| description |
Measurements 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 (|Δϕ| < π/3) and back-to-back pairs (|Δφ| > 2π/3) over the transverse momentum range 0.4 < p[subscript 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 ν[subscript n] as a function of p[subscript T] and event activity. The extracted ν[subscript n] values for n=2 to 5 decrease with n. The ν₂ and ν₃ values are found to be positive in the measured pT range. The ν₁ is also measured as a function of p[subscript T] and is observed to change sign around p[subscript T]≈1.5-2.0 GeV and then increase to about 0.1 for p[subscript T] > 4 GeV. The ν₂ (p[subscript T]), ν₃ (p[subscript T]), and ν₄(p[subscript T]) are compared to the ν 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[subscript T] of particles produced in the two collision systems.
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2024-09-23T15:20:37Z
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Article
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mit-1721.1/116203
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Massachusetts Institute of Technology
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2024-09-23T15:20:37Z
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2018
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American Physical Society (APS)
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dspace
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mit-1721.1/1162032024-07-15T17:46:41Z Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector Massachusetts Institute of Technology. Department of Physics Measurements 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 (|Δϕ| < π/3) and back-to-back pairs (|Δφ| > 2π/3) over the transverse momentum range 0.4 < p[subscript 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 ν[subscript n] as a function of p[subscript T] and event activity. The extracted ν[subscript n] values for n=2 to 5 decrease with n. The ν₂ and ν₃ values are found to be positive in the measured pT range. The ν₁ is also measured as a function of p[subscript T] and is observed to change sign around p[subscript T]≈1.5-2.0 GeV and then increase to about 0.1 for p[subscript T] > 4 GeV. The ν₂ (p[subscript T]), ν₃ (p[subscript T]), and ν₄(p[subscript T]) are compared to the ν 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[subscript T] of particles produced in the two collision systems. 2018-06-11T15:32:34Z 2018-06-11T15:32:34Z 2014-10 2014-09 2018-05-08T15:36:19Z Article http://purl.org/eprint/type/JournalArticle 0556-2813 1089-490X http://hdl.handle.net/1721.1/116203 Aad, G. et al. “Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector.” Physical Review C 90, 4 (October 2014): 044906 © 2014 CERN, for the ATLAS Collaboration http://dx.doi.org/10.1103/PHYSREVC.90.044906 Physical Review C Creative Commons Attribution 3.0 Unported license http://creativecommons.org/licenses/by/3.0/ application/pdf American Physical Society (APS) APS
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| spellingShingle |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title_full |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title_fullStr |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title_full_unstemmed |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title_short |
Measurement of Long-Range Pseudorapidity Correlations and Azimuthal Harmonics in √s[subscript NN] = 5.02 TeV Proton-Lead Collisions with the ATLAS Detector
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| title_sort |
measurement of long range pseudorapidity correlations and azimuthal harmonics in √s subscript nn 5 02 tev proton lead collisions with the atlas detector
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| url |
http://hdl.handle.net/1721.1/116203
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