Early time behavior of spatial and momentum anisotropies in kinetic theory across different Knudsen numbers - INSPIRE

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Early time behavior of spatial and momentum anisotropies in kinetic theory across different Knudsen numbers

Jan 31, 2022

19 pages

Published in:

Eur.Phys.J.C 82 (2022) 10, 961

Published: Oct 29, 2022

e-Print:

2201.13294 [nucl-th]

DOI:

10.1140/epjc/s10052-022-10914-9

View in:

ADS Abstract Service

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Abstract: (Springer)

We investigate the early time development of the anisotropic transverse flow and spatial eccentricities of a fireball with various particle-based transport approaches using a fixed initial condition. In numerical simulations ranging from the quasi-collisionless case to the hydrodynamic regime, we find that the onset of

v_n

and of related measures of anisotropic flow can be described with a simple power-law ansatz, with an exponent that depends on the amount of rescatterings in the system. In the few-rescatterings regime we perform semi-analytical calculations, based on a systematic expansion in powers of time and the cross section, which can reproduce the numerical findings.

Note:

19 pages, 30 plots in 17 figures. Version 2: published version

flow: transverse
momentum: anisotropy
flow: anisotropy
kinetic
fireball
hydrodynamics
transport theory
boundary condition
numerical calculations

References(41)

Figures(30)

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