  We investigate the relaxation dynamics in a chiral one-dimensional quantum
channel with finite range interactions, driven out of equilibrium by the
injection of high-energy electrons. While the distribution of high-energy
electrons, after dissipation of some of their energy, has been examined
previously (arXiv:2108.00685), we study the distribution of charge carriers
excited from the channel's Fermi sea during this process. Utilizing a detector
to measure the energetic imprint in the Fermi sea downstream of the injection
point, we discover an initial symmetry in the distribution of excited electrons
and holes relative to the Fermi level. However, this symmetry breaks down with
stronger interactions and increased propagation distances, attributed to terms
of order four and beyond in the interaction. We provide an intuitive
interpretation of these results in terms of interference between states with
different numbers of plasmons in the Fermi sea.
