Molnár Dénes (Purdue University): Elliptic flow from anisotropic escape
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Europe/Budapest
Tanacsterem
Tanacsterem
Description
While hydrodynamics is regarded as the dominant paradigm for describing
heavy-ion collisions at RHIC and LHC energies, its applicability to
nuclear reactions is not very well understood. Open question remain
about the mechanism of rapid thermalization, initial conditions,
treatment of decoupling (conversion of the fluid to particles), finite
system effects, and quantum corrections in very small systems, for
example. In a recent work (arXiv:1502.05572) we showed that in the AMPT
transport model elliptic flow is generated quite differently from
hydrodynamics, mainly through anisotropic escape from the collision
zone. I will demonstrate that this is, in fact, a general feature of
kinetic theory, originating in the modest opacities \sim 4-5 in
AMPT calculations. Implications of the escape effect will be discussed
together with connections to other hydro related problems such as proper
particle distributions (arXiv:1404.7850) and anisotropic flow from
quantum mechanics (arXiv:1404.4119).
