Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at sqrt(s) = 8 TeV

Understand

A search is presented for standard model (SM) production of four top quarks (t t-bar t t-bar) in pp collisions in the lepton + jets channel.

• The data correspond to an integrated luminosity of 19.6 inverse femtobarns recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC.
• The expected cross section for SM four top quark production is approximately 1 fb.
• A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background.