Kinetic freeze-out, particle spectra, and harmonic-flow coefficients from mode-by-mode hydrodynamics

Stefan Floerchinger and Urs Achim Wiedemann
Phys. Rev. C 89, 034914 – Published 31 March 2014

Abstract

The kinetic freeze-out for the hydrodynamical description of relativistic heavy-ion collisions is discussed using a background-fluctuation splitting of the hydrodynamical fields. For a single event, the particle spectrum, or its logarithm, can be written as the sum of the background part that is symmetric with respect to azimuthal rotations and longitudinal boosts and a part containing the contribution of fluctuations or deviations from the background. Using a complete orthonormal basis to characterize the initial state allows one to write the double differential harmonic-flow coefficients determined by the two-particle correlation method as matrix expressions involving the initial fluid correlations. We discuss the use of these expressions for a mode-by-mode analysis of fluctuating initial conditions in heavy-ion collisions.

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  • Received 6 December 2013
  • Revised 20 January 2014

DOI:https://doi.org/10.1103/PhysRevC.89.034914

©2014 American Physical Society

Authors & Affiliations

Stefan Floerchinger* and Urs Achim Wiedemann

  • Physics Department, Theory Unit, CERN, CH-1211 Genève 23, Switzerland

  • *stefan.floerchinger@cern.ch
  • urs.wiedemann@cern.ch

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Issue

Vol. 89, Iss. 3 — March 2014

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