A Search for Displaced Leptons in the ATLAS Detector

Dr. Lesya Horyn is a particle physics researcher. She grew up in New York, where her parents fostered a love of science and learning.. She began doing physics research at the American Museum of Natural History in New York City. She then received a Bachelor of Science from Tufts University, where she began working on the ATLAS experiment with collaborators both at Tufts and as a Research Experience for Undergraduates student at Duke University. She then completed a Ph. D at University of Chicago, where she performed the work presented in this thesis under the supervision of Professor Young-Kee Kim and Dr. Tova Holmes. She currently works on the CMS experiment with Fermi National Accelerator Laboratory and resides in Geneva, Switzerland. In her spare time, she likes reading, cycling, and traveling near and far.

Part 1: Introduction and Motivation.- Chapter 1: Introduction.- Chapter 2: Theory.-  Part 2: The Experiment.- Chapter 3: The Large Hadron Collider.- Chapter 4: The ATLAS detector.- Chapter 5: Object Reconstruction.- Chapter 6: Data and Monte Carlo Samples.- Part 3: Long Lived Particle Context.- Chapter 7: Searching for Long Lived Particles.- Chapter 8: Experimental Context.- Part 4: Search for Displaced Leptons.- Chapter 9: Event Selection.- Chapter 10: Backgrounds.- Chapter 11: Signal Systematics.- Part 5: Results.- Chapter 12: Results.- Chapter 13: Interpretation.- Chapter 14: Conclusions and Future Improvements.