Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 62: Astroteilchenphysik/Kosmologie (Theorie) 2

T 62.8: Talk

Tuesday, March 28, 2017, 18:30–18:45, VSH 17

Formation and Evolution of Axion Minicluster — Jonas Enander, •Andreas Pargner, and Thomas Schwetz — Institut für Kernphysik, Karlsruher Institut für Technologie (KIT), Germany

We study the cosmological evolution of the axion field in a scenario where the Peccei-Quinn symmetry is broken after inflation. We evolve the initial random field to the time of matter radiation equality to find the power spectrum of axions produced via the vacuum realignment mechanism. The power spectrum is used to study the subsequent gravitational collapse of overdensities into bound objects. This allows us to make a prediction for the distribution of mass and size of axion miniclusters.