  Characterization of the electronic band structure of solid state materials is
routinely performed using photoemission spectroscopy. Recent advancements in
short-wavelength light sources and electron detectors give rise to
multidimensional photoemission spectroscopy, allowing parallel measurements of
the electron spectral function simultaneously in energy, two momentum
components and additional physical parameters with single-event detection
capability. Efficient processing of the photoelectron event streams at a rate
of up to tens of megabytes per second will enable rapid band mapping for
materials characterization. We describe an open-source workflow that allows
user interaction with billion-count single-electron events in photoemission
band mapping experiments, compatible with beamlines at $3^{\text{rd}}$ and
$4^{\text{th}}$ generation light sources and table-top laser-based setups. The
workflow offers an end-to-end recipe from distributed operations on
single-event data to structured formats for downstream scientific tasks and
storage to materials science database integration. Both the workflow and
processed data can be archived for reuse, providing the infrastructure for
documenting the provenance and lineage of photoemission data for future
high-throughput experiments.
