Sven Kreiss
Published

Sun 17 August 2014

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PhD Thesis: Higgs Boson Discovery and First Property Measurements using the ATLAS Detector

Last May, I finished my PhD in Particle Physics. I had a great time studying physics and doing research at some of the best places: the University of Edinburgh, Scotland, for my bachelor’s and master’s degrees and New York University for my PhD including a year at CERN in Geneva, Switzerland. I also had great advisors: Tilman Plehn, Thomas Gregoire and Kyle Cranmer.

famous Higgs overview plot For my PhD, I was working on the discovery of the Higgs boson. CERN was an amazing place during that time, with the best particle physicists from all over the world working together. I made substantial contributions to the discovery in the ATLAS collaboration. I was the first person to combine two search channels and to see the 5σ discovery threshold being breached (blog post on the New York Times article). I created the plot on the right that was published in the ATLAS discovery paper, Science and many other places. I also worked on measuring the Higgs boson mass and the coupling strengths to other particles. A large part of my time was dedicated to statistical modeling and the development of analysis tools, some of which are now part of CERN’s ROOT data analysis tool and its statistics extension RooStats.

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