Abstract
The relativistic mass density which is transported by a quasi-monochromatic transverse wave packet is derived. The wave packet is assumed to propagate in isotropic cold collisionless plasma. The co-ordinate frame moving with the group velocity appears as the rest frame for both the mass density and the total mass of the wave packet. The equivalence of the energy-mass relation and the dispersion equation is demonstrated.
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Klíma, R., Petržílka, V.A. On the mass of a wave packet in plasma. Czech J Phys 23, 1196–1201 (1973). https://doi.org/10.1007/BF01591201
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DOI: https://doi.org/10.1007/BF01591201