Nonequilibrium attractor in high-temperature QCD plasmas
Peer reviewed, Journal article
Published version
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https://hdl.handle.net/11250/3049635Utgivelsesdato
2020Metadata
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Originalversjon
Almaalol, D., Kurkela, A., & Strickland, M. (2020). Nonequilibrium attractor in high-temperature QCD plasmas. Physical Review Letters, 125(12), 122302. 10.1103/PhysRevLett.125.122302Sammendrag
We establish the existence of a far-from-equilibrium attractor in weakly coupled gauge theory undergoing one-dimensional Bjorken expansion. We demonstrate that the resulting far-from-equilibrium evolution is insensitive to certain features of the initial condition, including both the initial momentum-space anisotropy and initial occupancy. We find that this insensitivity extends beyond the energy-momentum tensor to the detailed form of the one-particle distribution function. Based on our results, we assess different procedures for reconstructing the full one-particle distribution function from the energy-momentum tensor along the attractor and discuss implications for the freeze-out procedure used in the phenomenological analysis of ultrarelativistic nuclear collisions.