Extracting the Dark Matter Mass from Single Stage Cascade Decays at the LHC

Understand

We explore a variant on the MT2 kinematic variable which enables dark matter mass measurements for simple, one stage, cascade decays.

• This will prove useful for constraining a subset of supersymmetric processes, or a class of leptophilic dark matter models at the LHC.
• We investigate the statistical reach of these measurements and discuss which sources of error have the largest effects.
• For example, we find that using only single stage cascade decays with initial state radiation, a measurement of a 150 GeV dark matter candidate can be made to O(10%) for a parent mass of 300 GeV with a production cross section of 100 fb and 100 fb^(-1) of integrated luminosity.