Identifying Dark Matter Event Topologies at the LHC

Understand

Assuming dark matter particles can be pair-produced at the LHC from cascade decays of heavy particles, we investigate strategies to identify the event topologies based on the kinematic information of final state visible particles.

• This should be the first step towards measuring the masses and spins of the new particles in the decay chains including the dark matter particle.
• As a concrete example, we study in detail the final states with 4 jets plus missing energy.
• This is a particularly challenging scenario because of large experimental smearing effects and no fundamental distinction among the 4 jets.