Andrey Katz-UMD- "Jet substructure and the Search for Z' in Electroweak Boson Channels"

Thu, Dec 9, 2010, 2:00 pm to 3:00 pm
Jadwin 303
Abstract: "Strongly coupled models at the TeV scale often predict one or more Z' bosons which have appreciable branching ratios into EW bosons. These Z's are usually believed to have multi-TeV mass due to electroweak precision constraints, placing them on the edge of the LHC discovery reach. In my talk I will discuss the possibility of discovering these resonances at the LHC, taking advantage of recently developed jet substructure techniques. I will show model-independent Z' discovery reach in various decay channels. Alongside with significant improvements (compared to previous estimates) in known channels, I will discuss completely new signatures, which have not been previously studied in this context. One of these new channels involves the h--> tau tau decay, resulting in nearly-merged "di-tau jets". We propose novel techniques for tagging these objects and discuss efficiencies of our algorithms."