  Semivisible jets are a characteristic signature of many confining dark
sectors and consist of jets of visible hadrons intermixed with invisible stable
particles. Since their initial proposal, considerable progress has been made in
developing techniques for tagging anomalous jets. In this paper, we show that
the ability to tag semivisible jets can be used to define new event-level
variables which use generally ignored kinematic information and can
considerably increase our ability to discover dark confining sectors. In
practice, our best results are obtained by using the coefficients of the
decomposition of the missing transverse momentum in terms of the transverse
momenta of the jets tagged as anomalous. A benchmark scenario is introduced and
the increase in significance due to these new variables is studied over some of
its parameter space.
