Regular Article - Theoretical Physics
Dissipative corrections to particle spectra and anisotropic flow from a saddle-point approximation to kinetic freeze out
Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany
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Accepted: 1 July 2014
Published online: 17 July 2014
A significant fraction of the changes in momentum distributions induced by dissipative phenomena in the description of the fluid fireball created in ultrarelativistic heavy-ion collisions actually take place when the fluid turns into individual particles. We study these corrections in the limit of a low freeze-out temperature of the flowing medium, and we show that they mostly affect particles with a higher velocity than the fluid. For these, we derive relations between different flow harmonics, from which the functional form of the dissipative corrections could ultimately be reconstructed from experimental data.
© SIF and Springer-Verlag Berlin Heidelberg, 2014