Robert D. Peccei

Robert D. Peccei was a physicist known for his work in particle physics and cosmology. He contributed to understanding fundamental particles and the early universe. Most notably, he proposed the Peccei-Quinn theory, which addresses the "strong CP problem" in quantum chromodynamics—the question of why certain particles don't behave as expected. This theory predicts the existence of a new particle called the axion, which is also a candidate for dark matter. Peccei's work has been influential in both theoretical physics and cosmology, helping deepen our understanding of the universe's fundamental laws.