  The search for dark matter is one of the main science drivers of the particle
and astroparticle physics communities. Determining the nature of dark matter
will require a broad approach, with a range of experiments pursuing different
experimental hypotheses. Within this search program, collider experiments
provide insights on dark matter which are complementary to direct/indirect
detection experiments and to astrophysical evidence. To compare results from a
wide variety of experiments, a common theoretical framework is required. The
ATLAS and CMS experiments have adopted a set of simplified models which
introduce two new particles, a dark matter particle and a mediator, and whose
interaction strengths are set by the couplings of the mediator.
  So far, the presentation of LHC and future hadron collider results has
focused on four benchmark scenarios with specific coupling values within these
simplified models. In this work, we describe ways to extend those four
benchmark scenarios to arbitrary couplings, and release the corresponding code
for use in further studies. This will allow for more straightforward comparison
of collider searches to accelerator experiments that are sensitive to smaller
couplings, such as those for the US Community Study on the Future of Particle
Physics (Snowmass 2021), and will give a more complete picture of the coupling
dependence of dark matter collider searches when compared to direct and
indirect detection searches. By using semi-analytical methods to rescale
collider limits, we drastically reduce the computing resources needed relative
to traditional approaches based on the generation of additional simulated
signal samples.
