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Spatial-temporal Gauss-Laguerre waves in dispersive media.

A family of dispersionless and diffractionless spatial-temporal Gauss-Laguerre waves propagating in dispersive linear and transparent media is introduced. Contrary to pulsed Bessel beams and envelope-X waves recently studied in media with normal dispersion, these spatiotemporal Gauss-Laguerre beams may exist both in the normal and anomalous dispersion spectral regions of the medium.