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In this proceedings contribution, we summarize recent findings concerning thepresence of early- and late-time attractors in non-conformal kinetic theory. Westudy the effects of varying both the initial momentum-space anisotropy andinitialization times using an exact solution of the 0+1D boost-invariantBoltzmann equation with a mass- and temperature-dependent relaxation time. Ourfindings support the existence of a longitudinal pressure attractor, but theydo not support the existence of distinct attractors for the bulk viscous andshear pressures. Considering a large set of integral moments, we show that formoments with greater than one power of longitudinal momentum squared, bothearly- and late-time attractors are present.

Far-from-equilibrium attractors for massive kinetic theory in the relaxation time approximation