Date of Award

2015

Degree Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Graduate Group

Physics & Astronomy

First Advisor

Hugh Williams

Abstract

This thesis presents evidence for Higgs decays to tau leptons with the ATLAS experiment at the Large Hadron Collider. Special emphasis is given to the VBF semi-leptonic category of the analysis. The data correspond to 25/fb of proton collisions with 7 or 8 TeV. Particle reconstruction at ATLAS is discussed, with additional detail given to hadronic tau lepton decays. The analysis search strategy, predictions, and results are described. Prospects for the analysis, both in the near- and long-term, are also discussed.

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