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We present 3D fully kinetic shearing-box (SB) simulations of pair-plasmamagnetorotational turbulence with unprecedented macro-to-microscopic scaleseparation. We retrieve the expected fluid-model behavior of turbulent magneticfields and angular-momentum transport, and observe fundamental differences inturbulent fluctuation spectra linked with plasma heating. For the first time,we provide a definitive demonstration of nonthermal particle acceleration inkinetic magnetorotational turbulence agnostically of SB initial conditions, bymeans of a novel strategy exploiting synchrotron cooling.

Collisionless Magnetorotational Turbulence in Pair Plasmas: Steady-state Dynamics, Particle Acceleration, and Radiative Cooling