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We report two phenomena, induced by dynamical correlations, that occur duringthe free cooling of a two-dimensional mixture of inelastic hard disks. First,we show that, due to the onset of velocity correlations, the ratio of thekinetic energies associated with the two species changes from the valuecorresponding to the homogeneous cooling state to a value approximately givenby the mass ratio m_1/m_2 of the two species. Second, we report a novelsegregation effect that occurs in the late stage of cooling, whereinterconnected domains appear. Spectral analysis of the composition fieldreveals the emergence of a growing characteristic length.Comment: 4 pages, 5 figures, accepted for publication in Phys. Rev. Let

Ordering Phenomena in Cooling Granular Mixtures