Speaker
Dr
Antonios Kyriazis
(University of Iowa)
Description
Spontaneous symmetry breaking of global symmetries in the early universe may leave behind topological defects known as cosmic strings. These strings continuously emit the symmetry’s pseudo Nambu-Goldstone boson, which contributes to the dark matter density after it becomes non-relativistic. In the talk, I will discuss the numerical and analytical methods we developed to evaluate the density power spectrum induced by these relics and present the constraints on their mass and symmetry breaking scale, derived by comparison with various cosmological observables.
Authors
Dr
Antonios Kyriazis
(University of Iowa)
Prof.
Jeff Dror
(University of Florida)