Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √^SNN = 2.76 TeV

Journal Article · Mon Jul 11 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.107.032301· OSTI ID:1042843

Aamodt, K. ^[1]

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1. Univ. of Bergen, Bergen (Norway). et al.

We report on the first measurement of the triangular v₃, quadrangular v₄, and pentagonal v₅ charged particle flow in Pb-Pb collisions at √^SNN = 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow v₂ and v₃ have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. Here, we show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Contributing Organization: ALICE Collaboration
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1042843
• Journal Information: Physical Review Letters, Vol. 107, Issue 3; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS