Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at s NN =5.02 TeV
Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are studied as a function of the pseudorapidity separation (η) of the particle pair at small relative azimuthal angle (|φ| < π/3). The correlations are decomposed into a jet component that dominat...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
American Physical Society
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63047/1/63047_Pseudorapidity%20dependence%20of%20long-range%20two-particle_article.pdf http://irep.iium.edu.my/63047/2/63047_Pseudorapidity%20dependence%20of%20long-range%20two-particle_scopus.pdf http://irep.iium.edu.my/63047/ https://journals.aps.org/prc/pdf/10.1103/PhysRevC.96.014915 |
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| Summary: | Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are
studied as a function of the pseudorapidity separation (η) of the particle pair at small relative azimuthal angle
(|φ| < π/3). The correlations are decomposed into a jet component that dominates the short-range correlations
(|η| < 1), and a component that persists at large η and may originate from collective behavior of the
produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal
anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair
azimuthal correlations, V2 and V3, are extracted after subtraction of the jet component. The single-particle
anisotropy parameters v2 and v3 are normalized by their laboratory frame midrapidity value and are studied as a
function of ηc.m.. The normalized v2 distribution is found to be asymmetric about ηc.m. = 0, with smaller values
observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant
pseudorapidity dependence is observed for the normalized v3 distribution within the statistical uncertainties. |
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