Mikhail P. Solon Livres

This work explores the particle nature of dark matter and the implications of a new symmetry that arises when a hypothetical dark matter particle is heavier than known elementary particles. Dark matter, which constitutes about 85% of the universe's matter, remains elusive within the framework of existing particle physics. The thesis investigates this new symmetry, motivated by the lack of findings from LHC searches, predicting a universal interaction between dark matter and ordinary matter. This prediction aids in estimating event rates and detectable energy levels in dark matter direct detection experiments. The analysis of heavy wino and higgsino dark matter has established a benchmark in this area. Additionally, the research has initiated a new field in dark matter indirect detection, focusing on heavy WIMP annihilation rates through effective field theory methods. It introduces a novel approach for applying Lorentz invariance constraints in nonrelativistic theories, yielding unexpected results that challenge long-standing assumptions in heavy quark literature. Furthermore, the author presents new perturbative QCD results, offering a comprehensive analysis of crucial Standard Model observables, such as heavy quark scalar matrix elements of the nucleon. This influential work significantly impacts dark matter phenomenology, field theory formalism, and precision hadronic physics.