FatJets : From Buzz Words to Bread and Butter at the LHC

​Since the 1970's, the study of hadronic energy flows in collider based experiments has continually evolved. What started as the characterization of event-wide topological features grew to the point where one could abstractly speak about short-distance (quark and gluon) dynamics using the language of "jets". With the startup of the LHC nearly a decade ago, the world of jets acquired a new catch phrase - "boosted" - and our notion of what a jet represents evolved from quark/gluon to include massive particles includingthe W/Z and Higgs bosons as well as the top quark. Today, the study and usage of such objects, called "fatjets", has become standard fare in the world of LHC physics. With nearly 100fb-1 of pp collision data expected by the end of 2017 and the high luminosity LHC fast approaching, we are necessarily moving into an age of jets where fully exploiting the capability of the detector and pushing for precision understanding is crucial to a successful physics program at the LHC.

In this talk, I will give an overview of the most recent work from the ATLAS experiment in the area of large radius jets and jet substructure.