| In this thesis, I present my attempts to address the Inverse Puzzle in particle physics, i.e., the challenges associated with determining the phenomenological implications of experimental data. In particular, this thesis discusses (1) the limitations of measuring the mass of dark matter at the LHC, (2) new methods for searching for heavy neutrinos, (3) relationships between lepton- and baryon-number violating processes from the perspective of grand unified theories, (4) possible indications of connections between dark matter and lepton flavor, and (5) the possibility of observing additional sources of CP-invariance violation at neutrino oscillation experiments. |
