Searching for Dark Matter in Particle Physics Experiments
Astronomical observations have shown that the amount of visible matter in the universe comprises only a fraction of the total mass of the universe. This extra mass is described as ``dark matter''. In this thesis we search for evidence of a new type of particle that would be the dark matter in the universe and decay from heavy, long-lived supersymmetric particles produced in high energy proton anti-proton collisions. Since our particles have a long lifetime and decay into a photon and a gravitino, our dark matter candidate and the supersymmetric partner of the graviton, we search for evidence of photons that arrive delayed in time. This thesis explores a new search technique and uses data from run~II of the Fermilab Tevatron. We observe 24 events which is roughly consistent with our background expectation of 18.1 plus/minus 4.2 events.
Geffert, Paul (2008). Searching for Dark Matter in Particle Physics Experiments. Available electronically from