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arXiv · 1802.06804

Azimuthal Anisotropies at High Momentum from Purely Non-Hydrodynamic Transport

Paul Romatschke
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Abstract

In the limit of short mean free path, relativistic kinetic theory gives rise to hydrodynamics through a systematically improvable gradient expansion. In the present work, a systematically improvable expansion in the opposite limit of large mean free path is considered, describing the dynamics of particles which are almost, but not quite, non-interacting. This non-hydrodynamic "eremitic" expansion does not break down for large gradients, and may be useful in situations where a hydrodynamic treatment is not applicable. As applications, azimuthal anisotropies at high transverse momentum in Pb+Pb and p+Pb collisions at $\sqrt{s}=5.02$ TeV are calculated from the first order eremitic expansion of kinetic theory in the relaxation time approximation.

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Paul Romatschke. 2018-08-29. Azimuthal Anisotropies at High Momentum from Purely Non-Hydrodynamic Transport. https://doi.org/10.1140/epjc%2Fs10052-018-6112-6

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