Isabel Garcia Garcia
UC Santa Barbara
Wednesday, January 26, 2022
NS2 1201 and Zoom Seminar
Symmetries are an essential ingredient in our understanding of particle physics. Yet improvements in our understanding of gravity challenge some of our long-held views on the role of symmetries, as well as the reliability of the Effective Field Theory framework. In this talk, I will discuss how gravitational considerations beyond the realm of Effective Field Theory can provide an alternative perspective on some of the long-standing puzzles of the Standard Model and guide experimental exploration.
Focusing on the strong CP problem, I will show how extensions of the Standard Model that restore parity symmetry provide a compelling solution to this classic puzzle, with collider experiments being the most effective probe. Parity solutions are robust against the breaking of global symmetries that we expect in a theory of quantum gravity — in fact, the mandatory breaking of parity by gravitational effects highlights new avenues of exploration through EDM experiments and gravitational waves.
Throughout this talk I will emphasize the role of black hole thought experiments on our improved understanding of symmetries -- both global and gauge -- and argue that we have much left to learn from these fascinating objects.