  As no evidence for classic WIMP-based signatures of dark matter have been
found at the LHC, several phenomenological studies have raised the possibility
of accessing a strongly-interacting dark sector through new collider-event
topologies. If dark mesons exist, their evolution and hadronization procedure
are currently little constrained. They could decay promptly and result in
QCD-like jet structures, even though the original decaying particles are dark
sector ones; they could behave as semi-visible jets; or they could behave as
completely detector-stable hadrons, in which case the final state is just the
missing transverse momentum. In this contribution we will introduce a study
performed to explore use of jet substructure methods to distinguish dark-sector
from QCD jets in the first two scenarios, using observables in a IRC-safe
linear basis, and discuss ways forward for this approach to dark-matter at the
LHC.
