Dissipative corrections to particle spectra and anisotropic flow from a saddle-point approximation to kinetic freeze out

The European Physical Journal C

Nicolas Borghini¹  Christian Lang¹ 

[1] Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany;

关键词: Large Hadron Collider;    Saddle Point;    Transverse Momentum;    Transverse Velocity;    Flow Coefficient;   

DOI  :  10.1140/epjc/s10052-014-2955-7

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY