Jahid Hossain will present his comprehensive exam topic, “Solutions to the Strong CP Problem, Dark Matter Candidates, and Detection Methods” in person.

Abstract: Axions are hypothetical elementary particles that could address two fundamental problems in modern physics: the strong charge-parity (CP) problem in quantum chromodynamics (QCD) and the mystery of dark matter in cosmology. Proposed as a solution to the strong CP problem, axions arise from the Peccei-Quinn mechanism and serve as potential candidates for dark matter due to their unique properties. Over the past few decades, axions have been the subject of extensive experimental investigations. This study explores the origin of axions, their role in cosmology, and a review of key experiments conducted in search of these theoretically well-motivated particles.