Observation of Associated Near-Side and Away-Side Long-Range Correlations in √sNN=5.02 TeV Proton-Lead Collisions with the ATLAS Detector

Fox, Harald and Borissov, Guennadi and Allison, Lee and Barton, Adam and Bouhova-Thacker, Evelina and Chilingarov, Alexandre and Davidson, Ruth and Dearnaley, William and Grimm, Kathryn and Henderson, Robert and Hughes, Gareth and Jones, Roger and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Maddocks, Harvey and Smizanska, Maria and Walder, James (2013) Observation of Associated Near-Side and Away-Side Long-Range Correlations in √sNN=5.02  TeV Proton-Lead Collisions with the ATLAS Detector. Physical review letters, 110 (18). ISSN 1079-7114

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Abstract

Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) are measured in √sNN=5.02  TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1  μb-1 of data as a function of transverse momentum (pT) and the transverse energy (ΣETPb) summed over 3.1<η<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|Δη|<5) “near-side” (Δϕ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range “away-side” (Δϕ∼π) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ΣETPb, is found to match the near-side correlation in magnitude, shape (in Δη and Δϕ) and ΣETPb dependence. The resultant Δϕ correlation is approximately symmetric about π/2, and is consistent with a dominant cos⁡2Δϕ modulation for all ΣETPb ranges and particle pT.

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Additional Information: Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2013 CERN, for the ATLAS Collaboration
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 64411
Deposited By: ep_importer_pure
Deposited On: 10 May 2013 09:52
Refereed?: Yes
Published?: Published
Last Modified: 20 Feb 2020 01:46
URI: https://eprints.lancs.ac.uk/id/eprint/64411

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