Higher-order anisotropic flows and dihadron correlations in Pb-Pb collisions at sNN=2.76 TeV in a multiphase transport model

Jun Xu and Che Ming Ko
Phys. Rev. C 84, 044907 – Published 19 October 2011

Abstract

Using a multiphase transport model that includes both initial partonic and final hadronic scatterings, we have studied higher-order anisotropic flows as well as dihadron correlations as functions of pseudorapidity and azimuthal angular differences between trigger and associated particles in Pb-Pb collisions at sNN=2.76 TeV. With parameters in the model determined previously from fitting the measured multiplicity density of mid-pseudorapidity charged particles in central collisions and their elliptic flow in midcentral collisions, the calculated higher-order anisotropic flows from the two-particle cumulant method reproduce approximately those measured by the ALICE Collaboration, except at small centralities where they are slightly overestimated. Similar to experimental results, the two-dimensional dihadron correlations at most central collisions show a ridge structure at the near side and a broad structure at the away side. The short- and long-range dihadron azimuthal correlations, corresponding to small and large pseudorapidity differences, respectively, are studied for triggering particles with different transverse momenta and are found to be qualitatively consistent with experimental results from the CMS Collaboration. The relation between the short-range and long-range dihadron correlations with that induced by back-to-back jet pairs produced from initial hard collisions is also discussed.

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  • Received 4 August 2011

DOI:https://doi.org/10.1103/PhysRevC.84.044907

©2011 American Physical Society

Authors & Affiliations

Jun Xu1,* and Che Ming Ko2,†

  • 1Cyclotron Institute, Texas A&M University, College Station, Texas 77843-3366, USA
  • 2Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-3366, USA

  • *xujun@comp.tamu.edu
  • ko@comp.tamu.edu

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Issue

Vol. 84, Iss. 4 — October 2011

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