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arXiv · 1311.7613

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

Stefan Floerchinger·Urs Achim Wiedemann
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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 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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Stefan Floerchinger, Urs Achim Wiedemann. 2014-08-27. Kinetic freeze-out, particle spectra and harmonic flow coefficients from mode-by-mode hydrodynamics. https://doi.org/10.1103/physrevc.89.034914

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