Speaker
Description
Author and Presenter: Zach Weiner
Abstract: The apparent incompatibility of cosmological observations with massive neutrinos presents one of the most recent—and, from a particle-physics perspective, perhaps most concerning—cosmic conundrums. Interpreting the implications of these results requires a precise and complete understanding of which physical effects of massive neutrinos are in tension with current data. I will explain the origin of present neutrino mass bounds in not only the growth of structure but also the expansion history, which, despite being less commonly recognized, is at least as important as the former. I will then discuss the implications of this insight for possible systematics or new physics beyond the standard
