Joint HEP/Theory Seminar: Search for Supersymmetry in dilepton+jets+MET final state

My thesis research includes searches for SUSY in both strong and
electroweak productions in the dilepton channel using ATLAS 13 TeV p-p
collision data. The dilepton mass is a sensitive variable to probe new
physics and has a long history of discovery, including J/¿, Upsilon,
and Z boson. The Run-1 ATLAS dilepton SUSY search observed a 3.2 sigma
excess and drew a significant attention from the theory community (CMS
also observed an excess of 2.6 sigma in a different mll range). This
thesis work is motivated by these searches and checks the excesses
using Run-2 13 TeV data. In addition, this presentation also includes
new ideas (new search variable and new background method) for the
future higgsino-like searches (compressed models), where signal models
do not present in final states with large MET and large object pT,
which makes both the search strategy and the background estimation
become more challenging.