General analysis of signals with two leptons and missing energy at the Large Hadron Collider

Understand

A signal of two leptons and missing energy is challenging to analyze at the Large Hadron Collider (LHC) since it offers only few kinematical handles.

• This signature generally arises from pair production of heavy charged particles which each decay into a lepton and a weakly interacting stable particle.
• Here this class of processes is analyzed with minimal model assumptions by considering all possible combinations of spin 0, 1/2 or 1, and of weak iso-singlets, -doublets or -triplets for the new particles.
• Adding to existing work on mass and spin measurements, two new variables for spin determination and an asymmetry for the determination of the couplings of the new particles are introduced.