Cosmology and the String Axiverse

Particle Physics Theory seminar

Cosmology and the String Axiverse

  • Event time: 2:00pm
  • Event date: 12th January 2011
  • Speaker: David Marsh (University of Oxford)
  • Location: Lecture Theatre C,

Event details

Ultra-light scalar fields, with masses of between m=10^{-33} eV and m=10^{-22} eV, can affect the growth of structure in the Universe if they comprise a fraction of the total dark matter content. We identify the different regimes in the evolution of ultra-light scalar fields, how they affect the expansion rate of the universe and how they affect the growth rate of cosmological perturbations and CMB anisotropies. We find a number of interesting effects, discuss how they might arise in realistic scenarios of the early universe and comment on how they might be observed.

Event resources

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.