Sébastien Rettie

Sébastien Rettie


Vanier Scholar, Ph.D. Candidate

Department of Physics & Astronomy
The University of British Columbia


My research interests lie in the area of experimental high-energy particle physics. Particle physics studies the fundamental building blocks of the universe and their interactions with each other. More precisely, I am a member of the ATLAS Experiment at the Large Hadron Collider (LHC) at CERN. The ATLAS experiment consists of an international collaboration of over 3000 scientists working together to explore physics at the TeV energy scale, where new physical phenomena are expected to appear. The ATLAS detector is a multipurpose particle detector located in Geneva, Switzerland.

In 2012, the ATLAS collaboration announced the discovery of a new particle consistent with the Higgs boson. The next logical step of the physics program at the LHC is to precisely measure the properties of this newly observed particle. To this end, I am working with the New Small Wheel (NSW) group to characterize small Thin Gap Chambers (sTGC) for the forthcoming upgrade of the ATLAS detector in 2019. My research supervisor is Oliver Stelzer-Chilton.

In terms of data analysis, I am very interested in searching for physics beyond the standard model. More particularly, I have worked with the ATLAS supersymmetry (SUSY) group as an undergraduate research assistant, and am actively contributing to the Z' search efforts at the LHC. The specific signature I am looking for is that of a Z' candidate decaying into two leptons (either two electrons or two muons) in the final state. In addition, I currently serve as the liaison between the ATLAS Exotics and the Muon Combined Performace (MCP) groups.