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QCD Plasma Instabilities and Bottom-Up Thermalization
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abstract
We study the role of QCD plasma instabilities in non-equilibrium quark-gluon plasmas. First, we argue that such instabilities must drastically modify the "bottom-up" thermalization scenario for heavy-ion collisions. Second, we discuss conditions for the existence of instabilities in a more general context than previously treated in the QCD literature. We also give a thorough qualitative review of the origin of instabilities. We discuss some mechanisms whereby the growth of plasma instabilities saturates. Finally, we solve explicitly for instabilities and their growth rates for two extreme cases of anisotropic non-equilibrium plasmas that can be treated relatively simply and analytically: $f(\p) = F(p_\perp) \delta(p_z)$ and $f(\p) = F(p_z) \delta^{(2)}(p_\perp)$, where $f(\p)$ is the distribution of particles in momentum space.
Forward citations
Cited by 4 Pith papers
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Attractodynamics constructs a macroscopic closure around a nonthermal attractor; in the 0+1D BSY kinetic model, ideal and viscous truncations track the full kinetic evolution, with the viscous extension improving agre...
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Collective phenomena in chirally imbalanced medium
Chirally imbalanced quark-gluon plasma splits transverse gluon modes into circular polarizations, adds instabilities, and makes quarkonium melt faster via a larger Debye mass and decay width.
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Magnetized bottom-up thermalization in heavy-ion collisions
Strong magnetic fields may accelerate early quark production via gluon decay in the bottom-up scenario when |eB| approaches Q_s^2, modifying pre-equilibrium chemical composition.
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