On differences between even and odd anisotropic-flow harmonics in non-equilibrated systems - INSPIRE

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On differences between even and odd anisotropic-flow harmonics in non-equilibrated systems

Mar 24, 2022

18 pages

Published in:

Eur.Phys.J.C 83 (2023) 2, 114

Published: Feb 3, 2023

e-Print:

2203.13306 [nucl-th]

DOI:

10.1140/epjc/s10052-023-11256-w

View in:

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Abstract: (Springer)

To assess how anisotropic transverse flow is created in a system out of equilibrium, we compare several kinetic-theoretical models in the few-rescatterings regime. We compare the flow harmonics

v_n

from three types of transport simulations, with either

2\rightarrow 2

or

2\rightarrow 0

collision kernels and in the former case allowing the particles to rescatter several times or not, and from analytical calculations neglecting the gain term of the Boltzmann equation. We find that the even flow harmonics are similar in all approaches, while the odd ones differ significantly. This suggests that while even

v_n

harmonics may to a large extent be due to the anisotropic escape probability of particles, this is not the predominant mechanism underlying the odd

v_n

coefficients.

Note:

v2: expanded version (final): new title, 18 pages, 14 figures

flow: anisotropy
nucleus nucleus: scattering
Boltzmann equation
elliptic flow
triangular flow
numerical calculations

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