VIRTUAL MEETING ONLY: CPC Seminar: Gravitational waves from phase transitions: clearing the path between theory and experiment

  • Oct. 19, 2020, 3:00 pm 1603137600th/CAmerica/Chicago1031Mon, 19 Oct 2020 15:00:00 -0500pmMonday

Speaker: Graham White, IPMU
Abstract: Next generation gravitational wave detectors have a chance of verifying the existence of a cosmological first order transition. To make quantitative statements requires a proper understanding of the process of taking a model with a given set of parameters, converting those parameters into macroscopic thermal parameters and converting those thermal parameters into observables. In this talk I will quantify the theoretical uncertainties arising from scale dependence, the inhomogeneous nature of the back ground, gauge dependence as well as converting calculations done in a Minkowski background to an expanding Universe. The relative changes are significant, ranging from a factor of a few to multiple order of magnitude in the peak amplitude. I also show how to perform more rigorous treatments of these theoretical uncertainties.
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