Wing Sheung Chan

Copyright c 2021 Wing Sheung Chan ISBN: 978-94-6416-448-0 Beyond Vanilla – a search for lepton-flavour-violating Z → `τ decays with the ATLAS detector Thesis, Radboud Universiteit Nijmegen Cover design: Mimi Szeto – www.szetomimi.com / maniya852@gmail.com Printing: Ridderprint, the Netherlands This work has been performed at the National Institute for Subatomic Physics (Nikhef) which is funded by the Dutch Research Council (NWO). The research was financially supported by the NWO Innovational Research Incentives Scheme (Vici).