Speaker
Description
After reviewing the familiar definition of parity transformations and why they are explicitly broken in the standard model, I will discuss three ways that parity can be upgraded to being either a spontaneously broken or an exact symmetry. The resulting theories remain as interesting, aesthetically-driven speculations for physics beyond the standard model that can be searched for experimentally and/or observationally. One of them -- mirror matter -- was actually briefly discussed by T.D. Lee and C.N. Yang at the end of their Nobel-prize-winning paper on parity violation.