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In easy-plane ferromagnets, we show that the interplay between a domain walland a spin wave packet can be formulated as the collision of two massiveparticles with a gravity-like attraction. In the presence of magneticdissipation, the domain wall mimics a particle subject to viscous friction,while the spin wave packet resembles a particle of variable mass. Due toattractive nature of the interaction, the domain wall acquires a backwarddisplacement as a spin wave packet penetrating the domain wall, even thoughthere is no change in momentum of the wave packet before and after penetration.

Spin wave driven domain wall motion in easy-plane ferromagnets: a particle perspective