Testing non-standard cosmologies with gravitational waves

Particle Physics Theory seminar

Testing non-standard cosmologies with gravitational waves

  • Event time: 2:00pm until 3:00pm
  • Event date: 19th April 2023
  • Speaker: Ivonne Zavala Carrasco (Swansea University)
  • Location: Room 5327,

Event details

In theories beyond standard model, the presence of additional degrees of freedom, such as scalars, is ubiquitous. These fields may give rise to a non-standard period of cosmological evolution between the end of inflation and the onset of primordial BBN. While this epoch is poorly constrained by current cosmological experiments, gravitational waves constitute a powerful new tool to test this epoch, and thus these theories.

In this talk, I will discuss the modified cosmological evolution due to the presence of a class of scalar-tensor theories, motivated by string theory. The modified evolution can give rise to changes in the thermal dark matter abundance,  the net number of e-folds of inflation, PBH production. Moreover, it also provides a natural set-up for early dark energy models. I will then discuss how such an epoch can be tested by future GW experiments.

About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..

Find out more about Particle Physics Theory seminars.