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T: Fachverband Teilchenphysik

T 67: Neutrinophysik / theoretische Astroteilchenphysik

T 67.6: Talk

Wednesday, March 21, 2018, 17:45–18:00, Z6 - SR 2.011

Axion minicluster power spectrum and mass function — •Andreas Pargner and Thomas Schwetz — Institut für Kernphysik, Karlsruher Institut für Technologie (KIT), 76021 Karlsruhe, Germany

We present a semi-analytical method to calculate the average axion energy density, as well as the power spectrum, from the re-alignment mechanism in a scenario where the Peccei-Quinn symmetry breaking happens after inflation. Furthermore, we develop a modified Press & Schechter approach, suitable to describe the collapse of non-linear density fluctuations during radiation domination. This allows us to make a prediction for the distribution of mass and size of axion miniclusters.