Speaker
Peera Simakachorn
(UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))
Description
A fast-spinning axion can dominate the Universe at early times and generates the so-called kination era. The presence of kination imprints a smoking-gun spectral enhancement in the primordial gravitational-wave (GW) background. Current and future-planned GW observatories could constrain particle theories that generate the kination phase. Surprisingly, the viable parameter space allows for a kination era at the PeV-EeV scale and generates a peaked spectrum of GW from either cosmic strings or primordial inflation, which lies inside ET and CE windows.
| First author | Peera Simakachorn |
|---|---|
| peera.simakachorn@desy.de | |
| Collaboration / Activity | Quantum Universe Cluster, UHH |
Primary authors
Peera Simakachorn
(UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))
Geraldine Servant
(T (Cosmology))
Yann Gouttenoire
(T (Cosmology))
