YTF 24

Session

Dark Matter and Gravitational Observables

19 Dec 2024, 14:50

Ph8 (Centre for Particle Theory)

Description

Chair: Jack Franklin

31. Gravitational waves and de Sitter spacetime

David Waisman Andrade (Queen Mary University of London)

19/12/2024, 14:50

Abstract:

Understanding and detecting gravitational waves is key to testing new theories.
Gravitational wave calculations from black holes all assume the background spacetime is flat.
Understanding these in a de Sitter background is imperative, and has a two-fold effect:
- It expands the reach of future gravity waves observations to the earliest universe (inflation) and also the largest...

40. A novel probe of graviton dispersion relations at nano-Hertz frequencies

Bill Atkins (Swansea University)

19/12/2024, 15:20

We generalise Phinney's 'practical theorem' to account for modified graviton dispersion relations motivated by certain cosmological scenarios. Focusing on specific examples, we show how such modifications can induce characteristic localised distortions, bumps, in the frequency profile of the stochastic gravitational wave background emitted from distant binary sources. We concentrate on...

28. Listening for ultra-heavy dark matter with underwater acoustic detectors

Damon Cleaver (King's College London)

19/12/2024, 15:50

The possibility of detecting ultra-heavy dark matter often poses a significant challenge due to the incredibly suppressed flux. As a result, even models with high cross sections with respect to the weak scale WIMPs remain unconstrained. In this talk, we show the potential for future large scale acoustic detectors in the ocean initially proposed for ultra high energy neutrino detection could...