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Description
The most striking experimental evidence for physics beyond the
standard model of particle physics is the observation of Dark Matter
in the universe. Since the properties of this type of matter are still
unknown, one of the main goals of the LHC in Run-2 will be the
observation of its invisible signature in proton-proton collisions.
This seminar will present CMS results, based on LHC data from Run-1,
in which new stringent constraints on the production of Dark Matter
models are placed. The search targets final states of missing energy
in association with the production of both mono-jet and mono-V
topologies, where the improved sensitivity results from new
reconstruction methods, including jet substructure techniques for
boosted vector bosons, as well as improved modeling of the V+jets
backgrounds.
Following recent developments, the results are interpreted in terms of
mediator models, where the 'mediator' couples to the standard model
particles and the dark sector. These new interpretations provide a
more complete set of constraints - in particular, the results are
interpreted in terms of invisible decays of the SM Higgs boson. The
CMS results are also compared to results from direct searches and
relic constraints, showing the overlap and complementarity of the
various approaches. Finally, the plans for Dark Matter searches in LHC
Run-2, at higher collision energy, will be outlined.