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We present a universal description of the velocity distribution function ofgranular gases, $f(v)$, valid for both, small and intermediate velocities where$v$ is close to the thermal velocity and also for large $v$ where thedistribution function reveals an exponentially decaying tail. By means oflarge-scale Monte Carlo simulations and by kinetic theory we show that thedeviation from the Maxwell distribution in the high-energy tail leads to smallbut detectable variation of the cooling coefficient and to extraordinary largerelaxation time.Comment: 11 pages, 7 figure

GRANULAR GAS COOLING AND RELAXATION TO THE STEADY STATE IN REGARD TO THE OVERPOPULATED TAIL OF THE VELOCITY DISTRIBUTION