标题：Observation of Associated Near-Side and Away-Side Long-Range Correlations in √sNN=5.02 TeV Proton-Lead Collisions with the ATLAS Detector
作者：Aad, G. ;Abajyan, T. ;Abbott, B. ;Abdallah, J. ;Abdel Khalek, S. ;Abdelalim, A.A. ;Abdinov, O. ;Aben, R. ;Abi, B. ;Abolins, M. ;Abouzeid, O.S. ;Abramo 更多 作者机构：[Adamczyk, L. ] AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland; Laboratory for Particle P 更多
来源：Physical Review Letters
摘要：T. © 2013 CERN.
">Two-particle correlations in relative azimuthal angle (Δρ) 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" (Δρ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range "away-side" (Δρ∼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 Δρ) and ΣETPb dependence. The resultant Δρ correlation is approximately symmetric about π/2, and is consistent with a dominant cos2Δρ modulation for all ΣETPb ranges and particle pT. © 2013 CERN.