Bryan Roberts (LSE): Three Merry Roads to T-Violation

Title: Three Merry Roads to T-Violation

Abstract: This talk aims to give a general perspective on how the fundamental laws of nature can distinguish between the past and the future; or be T-violating. I argue that; in terms of basic analytic arguments; there are really just three approaches currently being explored. I show how each is characterized by a symmetry principle; which provides a template for detecting T-violating laws even without knowing the laws of physics themselves. Each approach is illustrated with an example; and the prospects for each are considered in extensions of particle physics beyond the standard model.