26-30 July 2021
Europe/Berlin timezone

Primordial gravitational waves revealed by a spinning axion

Not scheduled


Poster Cosmology T02: Cosmology


Peera Simakachorn (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))


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.

Collaboration / Activity Quantum Universe Cluster, UHH
Email peera.simakachorn@desy.de
First author Peera Simakachorn

Primary authors

Peera Simakachorn (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik)) Geraldine Servant (T (Cosmology)) Yann Gouttenoire (T (Cosmology))

Presentation Materials