Hydrodynamic modeling of pseudorapidity flow correlations in relativistic heavy-ion collisions and the torque effect

Piotr Bożek, Wojciech Broniowski, and Adam Olszewski
Phys. Rev. C 91, 054912 – Published 26 May 2015

Abstract

We analyze correlations between the event-plane angles in different intervals of pseudorapidity within the 3+1-dimensional viscous hydrodynamics with the Glauber-model initial conditions. As predicted earlier, the fluctuations in the particle production mechanism in the earliest stage, together with asymmetry of the emission profiles in pseudorapidity from the forward and backwardgoing wounded nucleons, lead to the torque effect, namely, decorrelation of the event-plane angles in distant pseudorapidity bins. We use two- or three-bin measures of correlation functions to quantify the effect, with the latter compared to the recent data from the CMS collaboration. We find a sizable torque effect, with magnitude larger at the BNL Relativistic Heavy Ion Collider than at the CERN Large Hadron Collider.

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  • Received 30 March 2015

DOI:https://doi.org/10.1103/PhysRevC.91.054912

©2015 American Physical Society

Authors & Affiliations

Piotr Bożek1,*, Wojciech Broniowski2,3,†, and Adam Olszewski3,‡

  • 1AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
  • 2The H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Cracow, Poland
  • 3Institute of Physics, Jan Kochanowski University, 25-406 Kielce, Poland

  • *piotr.bozek@fis.agh.edu.pl
  • wojciech.broniowski@ifj.edu.pl
  • adam.olszewski.fiz@gmail.com

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Issue

Vol. 91, Iss. 5 — May 2015

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